Greenhouse gas emission calculation system, greenhouse gas emission calculation method and program

Abstract

We provide a calculation system that can easily calculate greenhouse gas emissions. [Solution] The greenhouse gas emission calculation system comprises an accounting data acquisition unit, a memory unit, a subject group determination processing unit, an item determination processing unit, and an emission calculation unit. The accounting data acquisition unit acquires accounting data of the company to be calculated. The memory unit includes a group of masters that hold a company basic information master, a subject group master, an item determination master, an industry master, and various statistical information. The subject group determination processing unit uses the subject group master to extract, as journal data, records from each record of the accounting data that are subject to calculation of greenhouse gas emissions. For journal data for which the subject group determination processing unit was unable to determine the calculation item, the item determination processing unit determines the calculation item using the item determination master and the group of masters that hold the company basic information master, the industry master, and various statistical information. The emission calculation unit calculates greenhouse gas emissions for each journal data.

Description

[Technical Field]

[0001] The present invention relates to a greenhouse gas emission calculation system, a greenhouse gas emission calculation method, and a program. [Background technology]

[0002] In order to promote the decarbonization of local industries, the national and local governments have been expanding subsidy programs, but many companies tend to view decarbonization as an increase in costs, and the effects are limited.In addition, local governments and financial institutions have strengthened support measures for decarbonization of supply chains, and large companies are also requesting that their business partners disclose emissions in order to reduce emissions in their supply chains.However, many small and medium-sized enterprises in particular lack the human resources, funds, and know-how, and currently find it difficult to calculate greenhouse gas emissions, which is the first step toward decarbonization, on their own.

[0003] Patent Document 1 describes a corporate activity evaluation system that engages in environmental management, which accepts input of corporate activity information having subjects and details and their costs, determines whether each record of the corporate activity information is an evaluation target for GHG calculation based on boundary information that indicates whether it is an evaluation target for GHG calculation, determines economic costs that indicate the costs of the corporate activity information, and determines environmental costs that indicate GHG emissions for each record that has been determined to be an evaluation target for GHG calculation based on calculation coefficients that are associated with the subjects or details and are used to calculate GHG emissions based on costs.

[0004] According to the system described in Patent Document 1, when corporate activity information including items, details, and their costs is entered, it is possible to determine whether or not a business is eligible for evaluation for GHG calculations based on boundary information. Since corporate activity information including items, details, and their costs is held by all companies, regardless of industry, users can efficiently and easily evaluate corporate activities for environmental management even if they do not fully understand the evaluation indicators for environmental management or the information required for evaluation. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6896315 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the system described in Patent Document 1 requires that the "items" among the "business activity information with items and items, and their costs" that it accepts as input have a hierarchical structure that includes at least items with items as their parent, and items with items as their parent. Therefore, system users must input the business activity information into a specified form while mapping it to create such a hierarchical structure, which is not sufficient in terms of simplicity and is not particularly user-friendly for small and medium-sized enterprises.

[0007] Therefore, an object of the present invention is to provide a greenhouse gas emission calculation system, an emission amount calculation method, and a program that can easily calculate greenhouse gas (GHG) emission amounts. [Means for solving the problem]

[0008] A greenhouse gas emission calculation system according to one embodiment of the present invention comprises an accounting data acquisition unit, a memory unit, a subject group determination processing unit, an item determination processing unit, and an emission calculation unit. The accounting data acquisition unit acquires accounting data of companies whose greenhouse gas emissions are to be calculated. The memory unit includes at least a company basic information master that holds basic company information about the companies whose emissions are to be calculated, a subject group master, an item determination master, an industry master, and a group of masters that hold various statistical information. The subject group determination processing unit uses the subject group master to extract, from each record of the accounting data, records that are to be subject to greenhouse gas emission calculation as journal data that include items necessary for the calculation. For journal data for which the subject group determination processing unit was unable to determine the calculation item, the item determination processing unit determines the calculation item using the item determination master, the company basic information master, the industry master, and the group of masters that hold various statistical information. The emission calculation unit calculates greenhouse gas emissions for each journal data.

[0009] In the above aspect, if the item determination processing unit is unable to determine the valuation item using the item determination master and the company basic information master, it may determine the valuation item using the item determination master, the industry master, and a group of masters that hold various statistical information.

[0010] In the above aspect, the system may further include a physical quantity conversion unit, and when the calculation item of the journal data corresponds to energy, the physical quantity conversion unit may convert data regarding monetary amounts in the journal data into physical quantities prior to calculation in the emission amount calculation unit. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a greenhouse gas emission calculation system, a greenhouse gas emission aggregation method, and a program that can calculate greenhouse gas emissions simply by importing accounting data, which contributes to the simple and efficient evaluation of environmental supply chain management activities in companies that are committed to environmental management. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a diagram showing the configuration of a greenhouse gas emission calculation system according to an embodiment. [Figure 2] 1 is a diagram illustrating a hardware configuration of a greenhouse gas calculation apparatus according to an embodiment. [Figure 3] FIG. 2 is a diagram illustrating functional blocks of a computing device according to an embodiment. [Figure 4] FIG. 2 is a diagram showing an example of data of a subject group master in the greenhouse gas emission calculation system according to the embodiment. [Figure 5] FIG. 2 is a diagram showing an example of data of an item determination master in the greenhouse gas emission calculation system according to the embodiment. [Figure 6] FIG. 10 is a diagram showing an item determination process flow in the greenhouse gas emission calculation system according to the embodiment. [Figure 7] FIG. 2 is a diagram showing an emission amount calculation process flow in the greenhouse gas emission amount calculation system according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] Preferred embodiments of a greenhouse gas emission calculation system, a greenhouse gas emission calculation method, and a program according to the present invention will be described with reference to the accompanying drawings. However, the embodiments are intended to facilitate understanding of the present invention and are not intended to limit the present invention.

[0014] [System Configuration] Fig. 1 is a diagram showing the configuration of a greenhouse gas emission calculation system 1 according to a preferred embodiment of the present invention. As shown in Fig. 1, in the greenhouse gas emission calculation system 1, a greenhouse gas calculation device 10, an administrator terminal device 20, and a user terminal device 30 are connected via a network 40.

[0015] The greenhouse gas calculation device 10 is a general-purpose information processing device such as a dedicated system, a general-purpose computer, a server, or a plurality of computers distributed over a network (cloud computer), and can implement a function for calculating greenhouse gas emissions (hereinafter simply referred to as "emissions") by installing a program.

[0016] The manager terminal device 20 is a device used by the manager, that is, the provider of the greenhouse gas emission calculation system 1, and can be any information processing device such as a general-purpose computer.

[0017] The user terminal devices 30 are devices used by users of the greenhouse gas emission calculation system 1, and any information processing device such as a general-purpose computer can be used. The number of user terminal devices 30 connected to the network 40 is determined according to the number of users of the greenhouse gas emission calculation system 1.

[0018] The network 40 serves to connect the greenhouse gas calculation apparatus 10, the manager terminal device 20, and the user terminal device 30 to one another, and any wired or wireless network can be used.

[0019] [Hardware configuration] Fig. 2 is a diagram showing the hardware configuration of a greenhouse gas calculation apparatus 10 according to a preferred embodiment of the present invention. As shown in Fig. 2, the greenhouse gas calculation apparatus 10 includes, for example, an arithmetic unit 110, a storage unit 120, an auxiliary storage unit 130, an input unit 140, an output unit 150, and a communication unit 160, which are connected to each other.

[0020] The computing device 110 includes a processor such as a CPU capable of executing an instruction set.

[0021] The storage device 120 includes a memory such as a RAM that stores an instruction set.

[0022] The auxiliary storage device 130 includes a recording medium such as an HDD or an SSD for storing programs. The auxiliary storage device 130 may also be a cloud storage.

[0023] The input device 140 is a device that receives input from the outside, such as a keyboard or a mouse.

[0024] The output device 150 is a device that outputs data to the outside, such as a display or a printer.

[0025] The communication device 160 has a communication interface for transmitting and receiving various data via a network.

[0026] [Function Block] Fig. 3 is a diagram showing functional blocks of the calculation device 110 included in the greenhouse gas calculation apparatus 10 according to a preferred embodiment of the present invention. As shown in Fig. 3, the calculation device 110 includes, for example, an accounting data acquisition unit 200, a basic company information acquisition unit 300, an item group determination processing unit 400, an item determination processing unit 500, a physical quantity conversion unit 600, an emission calculation unit 700, a display processing unit 800, and a memory unit 900 that exchanges data with these units.

[0027] The accounting data acquisition unit 200 acquires accounting data of companies for which emissions are to be calculated. At this time, the accounting data does not need to be mapped to a predetermined hierarchical structure, and can be imported directly from a general ledger, journal entry diary, etc.

[0028] The company basic information acquisition unit 300 acquires basic information about the company whose emissions are to be calculated, such as sales, number of employees, location, business details, etc. In addition, as necessary, it acquires information about the company whose emissions are to be calculated, such as the energy procurement situation, account item use, owned vehicle information, and employee commuting means.

[0029] The subject group determination processing unit 400 determines the subject group of each accounting data from the contents of the account subject, sub-subject and summary in the accounting data, and extracts the journal data that is the target for determining the emission amount.

[0030] The item determination processing unit 500 determines the valuation item for the journal data for which the valuation item is unknown or could not be determined by the subject group determination processing unit 400.

[0031] The quantity conversion unit 600 converts fuel costs (fuel purchase costs), power costs (electricity and steam purchase costs), utility costs, etc. in the journal data from monetary amounts to quantities using the respective energy unit prices.

[0032] The emission amount calculation unit 700 calculates the emission amount for the journal data using the emission coefficients and emission intensity units.

[0033] The display processing unit 800 formats the emission amount calculation results calculated by the emission amount calculation unit 700 into a predetermined display format and outputs the results.

[0034] The storage unit 900 includes, for example, various masters such as a company basic information master 901, accounting data 902, subject group master 903, item determination master 904, industry master 905, region master 906, unit price master 907, and emission coefficient master group 910.

[0035] The company basic information master 901 holds basic information such as the company's accounting period, sales, number of employees, location, and industry classification, which are acquired by the company basic information acquisition unit 300 as essential items for calculating emissions.

[0036] Furthermore, the company basic information master 901 may hold information such as the company's business activities, information on owned vehicles, and account item usage (such as breakdowns of utility costs, company cars, and energy procurement status) as optional items used to improve the accuracy of emission calculations, which are acquired by the company basic information acquisition unit 300. These optional items are acquired by interviewing the companies whose emissions are to be calculated.

[0037] The accounting data 902 is a CSV file of a general ledger, journal entry diary, or the like acquired by the accounting data acquisition unit 200, and includes items such as date, account title, sub-title, summary, department, amount, and consumption tax classification.

[0038] The subject group master 903, an example of which is shown in FIG. 4, holds information on account subjects, sub-subjects, summaries, etc., which are necessary for determining the subject group of each journal entry in the accounting data.

[0039] The account group determination processing unit 400 makes a determination based on this account group master 903, but if there is data in the "item" column of the account group master 903, it can determine the calculation item at the same time as determining the account group. If there is no data in the "item" column as shown in A of Figure 4, the account group determination processing unit 400 cannot determine the calculation item, so the calculation item will be determined by the item determination processing unit 500. Note that even for the same account item, there are cases where the calculation item can or cannot be determined, as shown in B of Figure 4, and there are cases where the calculation item is different, as shown in C of Figure 4.

[0040] If the subject group determination processing unit 400 processes each journal entry in the order of data sorting from top to bottom, there may be cases where, depending on the conditions, duplicate calculations or calculation omissions occur, resulting in inaccurate figures. Therefore, as shown in Figure 4, the "Calculation Processing Group" field in the "Subject Group Master 903" may be used to group each journal entry, prioritize them, and process them separately.

[0041] The item determination master 904 is used to make item determinations based on more detailed conditions for accounting data for which the item determination processing unit 400 was unable to determine the calculation item, and holds information regarding, for example, auxiliary item summaries, as shown in an example in Figure 5.

[0042] The industry master 905 holds the master of the Japan Standard Industrial Classification (major classification: 20 industries, medium classification: 90 industries) published by the Ministry of Internal Affairs and Communications. Since the calculation method and calculation coefficient of emissions differ depending on the industry, this master is necessary for calculating emissions.

[0043] The regional master 906 holds a master of representative suppliers (deemed suppliers) of electricity, gas, etc. for each region, and is used in combination with the company basic information master 901 to identify the deemed supplier when the supplier of electricity, gas, etc. cannot be determined from the accounting data of the company subject to emissions calculation.

[0044] The unit price master 907 holds the unit prices of fuel, electricity, etc., using statistical information published by public institutions such as government ministries and agencies in Japan. The energy unit prices registered in this unit price master 907 are used to convert the amount of fuel, electricity, etc. used from monetary value to physical volume.

[0045] The emission coefficient master group 910 includes an industry-specific deemed procurement master group 911, a commuter transportation master group 912, an emission coefficient master group 913, and a deemed composition ratio master group 914, which are used for calculating emission amounts and the like.

[0046] The deemed procurement master by industry 911 sets representative procurement items in accordance with industry and customer characteristics for account items related to cost of sales, manufacturing cost, and product cost, and holds information estimating their ratios (amount composition ratios). For account items related to cost of sales, manufacturing cost, and product cost, such as purchases, raw material purchases, product purchases, parts, auxiliary materials, outsourcing costs, and subcontract processing costs, it is often difficult to determine the items to be calculated from accounting journal data alone, but in such cases, emissions are calculated using the deemed procurement master by industry 911. Note that procurement items and their ratios can be flexibly set and changed in accordance with customer characteristics.

[0047] The commuter transportation means master 912 holds information on the national average proportion of commuter transportation means according to the industry characteristics and regional characteristics of the company for which emissions are being calculated, for example, the average proportion of commuters in a certain industry or region who use each means of transportation, such as passenger trains, buses, or automobiles, to commute to work.

[0048] The emission coefficient master 913 is used to calculate emissions, and the databases provided by the Ministry of the Environment, "Calculation methods and emission coefficients in the calculation, reporting and disclosure system" and "Emissions intensity database for calculating greenhouse gas emissions of organizations through the supply chain," are set as masters for emission coefficients and emission intensity.

[0049] The deemed composition ratio master group 914 includes deemed composition ratio master data relating to utility costs, water charges, fuel costs, vehicle costs, and the like.

[0050] The assumed composition ratio master for utility costs holds the proportion (amount composition ratio) of water, electricity, gas, etc. in utility costs for each industry (for example, by industry classification code), which is set based on the industry-specific expense expenditure ratio obtained from statistical information.

[0051] Water bill gold The deemed composition ratio master is the water charges by industry, apportioned by breakdown estimated by industry based on statistical information. gold The proportion of water supply and sewerage in the total is maintained.

[0052] The deemed composition ratio master for fuel costs holds the proportions (amount composition ratios) of coal, coal coke, natural gas, liquefied natural gas, city gas, crude oil, gasoline, jet fuel oil, kerosene, diesel, heavy oil A to C, liquefied petroleum gas, oil coke, etc. in fuel costs for each industry (for example, by industry classification code), which are set based on the industry-specific cost expenditure ratios obtained from statistical information.

[0053] The deemed composition ratio master for vehicle expenses holds the proportions (amount composition ratios) of gasoline costs, tolls, parking fees, road service fees, etc. in vehicle expenses for each company or industry (for example, by industry classification code) subject to emission calculation, which are set based on the vehicle information (company car information) held among the interview items in the company basic information master 901 and the expense expenditure ratios by industry obtained from statistical information.

[0054] The process steps for calculating emissions by each of the above functional blocks will be explained below.

[0055] First, the subject group determination processing unit 400 performs subject group determination on the accounting data 902 acquired by the accounting data acquisition unit 200 using information in the subject group master 903 as shown in FIG.

[0056] Then, in the subject group determination, if the calculation item can be determined from the accounting data 902 (account item, summary, sub-item), the process proceeds directly to quantity conversion in the quantity conversion unit 600.If the calculation item cannot be determined (the item is unknown), the item determination processing unit 500 performs item determination, and then the process proceeds to quantity conversion in the quantity conversion unit 600.

[0057] The processing flow for this item determination will be described in detail with reference to FIG.

[0058] First, the basic company information including information obtained through interviews with the company is read from the basic company information master 901 (step S10), and the accounting data 902 is read from the accounting data acquisition unit 200 (step S11). Note that either step S10 or step S11 can be performed first.

[0059] Next, the subject group determination processing unit 400 refers to the subject group master 903 to search for the account subject, summary, and subsidiary subject to be calculated for the accounting data 902 (step S12), and determines the journal data to be processed (step S13).

[0060] Then, for the journal data to be processed, it is determined whether the account item, summary, sub-item, and calculation item have been determined (step S14).If the items have been determined, the process proceeds to step S17; if the items have not been determined, the process proceeds to step S15.

[0061] In step S15, the item determination processing unit 500 first determines the accounting items of the journal data from the basic company information by referring to the basic company information master 901. For example, if the individual accounting items (water, electricity, and gas) in the utility bills cannot be determined in step S14, the breakdown of each accounting item in the utility bills is estimated using the composition ratio of each accounting item (water, electricity, and gas) in the utility bills, which was obtained in advance by interviewing the company and is stored in the basic company information master 901, and the amount of the utility bills is allocated to the amount of each estimated accounting item (water, electricity, and gas).

[0062] Furthermore, if in step S15 the calculation items for the journal data cannot be determined from the basic company information due to insufficient interview information or the like, the process proceeds to step S16, where the calculation items for the journal data are determined based on statistical information by referring to the deemed composition ratio master group 914. For example, if in step S15 the breakdown of each calculation item (water, electricity, and gas) in the utility bills cannot be determined, the deemed composition ratio master for utility bills in the deemed composition ratio master group 914 is referenced to estimate the breakdown of each calculation item in the utility bills, and the amount of the utility bills is allocated to the estimated amount for each calculation item (water, electricity, and gas). The deemed composition ratio master for utility bills holds the proportions (amount composition ratios) of water, electricity, gas, etc. in the utility bills for each industry (e.g., by industry classification code) set based on the industry-specific expense expenditure ratios obtained from statistical information, and the breakdown of each calculation item in the utility bills can be estimated based on these proportions.

[0063] Then, for the accounting data to be processed, if the calculation items can be determined in either step S14, step S15 or step S16, the accounting data is confirmed as having the calculation items determined (step S17), and if the calculation items cannot be determined in any of step S14, step S15 or step S16, the accounting data is confirmed as having no calculation items determined (step S18), and the processing is terminated.

[0064] The journal data that has been finalized in step S18 and for which no calculation items have been determined is not used for calculating emissions, but may be retained for future audit responses and other uses.

[0065] As described above, in this embodiment, the calculation items for each journal entry data are determined through a three-stage process: (1) first, identify them from the sub-items and summaries of the account items; (2) if they cannot be identified from the sub-items and summaries of the account items, use the composition ratio of each calculation item in the account items based on interview information; and (3) if interview information cannot be utilized, use the composition ratio of each calculation item in the account items based on statistical information. Therefore, even if the calculation items for each journal entry data cannot be identified from the sub-items and summaries of the account items, by utilizing interview information or statistical information, item determination can be performed easily and with a sufficiently high degree of accuracy for practical use.

[0066] Following the above determination process, the emissions calculation unit 700 calculates emissions for the journal data for which the calculation item has been determined (journal data to be calculated). However, for journal data for which the calculation item corresponds to energy, it is necessary to perform physical quantity conversion in advance in the physical quantity conversion unit 600.

[0067] The process flow for converting into physical quantities and calculating emissions will be described in detail with reference to FIG.

[0068] First, the quantity conversion unit 600 reads the accounting data for the calculation target including information on the calculation item (step S20), and determines whether the accounting data corresponds to energy or not (step S21).

[0069] If the calculation item in the journal data does not correspond to energy, the process proceeds directly to step S26 for calculating emissions, and if the calculation item in the journal data corresponds to energy, the process proceeds to step S22 for converting the amount of material.

[0070] In step S22, the quantity conversion unit 600 reads information from the unit price master 907, the area master 906, and the company basic information master 901, and converts the monetary data of the accounting entry where the calculation item corresponds to energy into a quantity (usage: kWh, t, GJ / kl, etc.) using various unit prices, etc. (step S23), and then proceeds to step S24 for calculating the emission amount.

[0071] In the physical quantity conversion, the regional master 906 holds a master of representative suppliers (deemed suppliers) of electricity, gas, etc. for each region, and is used to identify the deemed supplier in combination with the company location information obtained from the company basic information master 901, for example, when the supplier of electricity, gas, etc. for water and utility bills cannot be determined from the accounting data.

[0072] Furthermore, the unit price master 907 holds the unit prices of energy such as fuel and electricity for each region of electricity, gas, etc., supplied by suppliers, using statistical information made public by public institutions such as government ministries and agencies in Japan, and converts the amount of fuel, electricity, etc. used from monetary value to physical quantity by dividing the amount of fuel, electricity, etc. by the energy unit price of the supplier or deemed supplier for each region.

[0073] Regarding the calculation of emissions in the emission calculation unit 700, first, the processing of journal data in which the calculation item corresponds to energy and which has been converted into physical quantities in step S23 will be described.

[0074] In step S24, the emission amount calculation unit 700 reads information from the emission coefficient master 913 and calculates the emission amount on a physical volume basis (step S25).

[0075] The emission coefficient master 913 sets the "Calculation methods and emission coefficients in the calculation, reporting and disclosure system" and the "Emissions intensity unit database for calculating greenhouse gas emissions, etc. of organizations through the supply chain," which are databases of information provided by the Ministry of the Environment, as masters of emission coefficients and emissions intensity units, and calculates emissions on a physical volume basis by multiplying the physical volume data converted in step S23 by this emissions intensity unit.

[0076] Next, the emission calculation performed by the emission calculation unit 700 when it is determined in step S21 that the accounting item is not journal data corresponding to energy will be described.

[0077] First, in step S26, for accounting data in which the calculation item does not correspond to energy, it is determined whether the calculation item is accounting data that is linked 1:1 to the emission coefficient. If it is determined that the calculation item is accounting data that is linked 1:1 to the emission coefficient, the process proceeds to step S27, and if it is determined that the calculation item is not accounting data that is linked 1:1 to the emission coefficient, the process proceeds to step S29.

[0078] If it is determined that the calculation item is journal data that is linked 1:1 to the emission coefficient and the process proceeds to step S27, the emission calculation unit 700 reads information from the emission coefficient master 913 (step S27) and calculates the emissions on a monetary basis by multiplying the journal monetary data by the emission coefficient and emission unit that are linked 1:1 to the calculation item (step S28).

[0079] On the other hand, if it is determined that the calculation item is not journal data that is linked 1:1 to the emission coefficient and the process proceeds to step S29, the emission calculation unit 700 reads information from the company basic information master 901 and the emission coefficient master group 910 (industry-specific deemed procurement master 911, commuter transportation means master 912, emission coefficient master 913, and deemed composition ratio master group 914) (step S29), determines the link between the calculation item and the emission coefficient by referring to the information in each master, and then calculates the emissions based on the company basic information and statistical information by multiplying the journal amount data by the ratio (the deemed composition ratio estimated from statistical data held by each master or the composition ratio obtained from interview information), the linked emission coefficient, and the emission unit (step S30).

[0080] Finally, the display processing unit 800 aggregates the emissions calculated in steps S25, S28, and S30 by scope and category as defined by the international standard for calculating greenhouse gas emissions (GHG Protocol) (step S31), generates an emissions calculation report (step S32), and terminates the process.

[0081] In this way, according to the greenhouse gas emissions calculation system of the embodiment, greenhouse gas emissions can be easily calculated simply by importing accounting data as is. Even if the items to be calculated cannot be determined from the accounting data, the system can automatically determine the items to be calculated while ensuring accuracy by using basic company information and statistical information. This will enable a simple and efficient evaluation of environmental supply chain management activities in companies that are committed to environmental management.

[0082] The above describes an embodiment of the present invention, but the disclosed technology is not limited to the above-described embodiment and can be implemented in various other forms within the scope of the gist of the disclosure. [Explanation of symbols]

[0083] 1. Greenhouse gas emissions calculation system 10...Greenhouse gas calculation device 20...Administrator terminal device 30...User terminal device 40…Network 110...Arithmetic device 120...Storage device 130…Auxiliary storage device 140...Input device 150...Output device 160...Communication equipment 200...Accounting Data Acquisition Department 300…Company basic information acquisition department 400...Subject group determination processing unit 500...Item determination processing unit 600...Quantity conversion section 700...Emissions calculation department 800...Display processing unit 900...Storage section

Claims

1. A greenhouse gas emissions calculation system, comprising: The system includes an accounting data acquisition unit, a storage unit, a subject group determination processing unit, an item determination processing unit, and an emission calculation unit, the accounting data acquisition unit acquires accounting data of companies whose greenhouse gas emissions are subject to calculation, The storage unit includes at least a company basic information master that holds basic company information of the target company, a subject group master, an item determination master, an industry master, and a master group that holds various statistical information, The master group for storing the various statistical information includes a deemed composition ratio master group including deemed composition ratio masters relating to utility costs, water charges, fuel costs, and vehicle costs, The subject group determination processing unit uses the subject group master to extract, from each record of the accounting data, records that are to be subject to calculation of greenhouse gas emissions, as journal entry data that include items necessary for calculation; The item determination processing unit determines the calculation item for the journal data for which the calculation item could not be determined by the subject group determination processing unit, using the item determination master, the company basic information master, the industry master, and the deemed composition ratio master group, The greenhouse gas emission calculation system includes an emission calculation unit that calculates greenhouse gas emissions for each of the journal data.

2. 2. The greenhouse gas emission calculation system of claim 1, wherein the item determination processing unit determines the calculation items using the item determination master, the industry master, and the deemed composition ratio master group when it is not possible to determine the calculation items using the item determination master and the company basic information master.

3. Further comprising a quantity conversion unit, 3. The greenhouse gas emission calculation system according to claim 1, wherein the physical quantity conversion unit converts data relating to monetary amounts in the journal data into physical quantities prior to calculation by the emission calculation unit when the calculation item in the journal data corresponds to energy.

4. A method for tabulating greenhouse gas emissions, comprising: Obtain accounting data for companies whose greenhouse gas emissions are subject to calculation, extracting journal data that are the subject of greenhouse gas emissions calculation from the accounting data; For those items of the journal data for which the calculation items could not be determined, the calculation items are determined using at least one of the basic corporate information, industry information, and assumed composition ratios of utility costs, water charges, fuel costs, and vehicle costs of the calculation target company; A method for calculating greenhouse gas emissions for each of the journal data.

5. 5. The greenhouse gas emissions aggregation method according to claim 4, wherein, when the calculation items cannot be determined using the basic company information, the calculation items are determined using at least one of the industry information and the assumed composition ratios of utility costs, water charges, fuel costs, and vehicle costs.

6. 6. The method for aggregating greenhouse gas emissions according to claim 4, wherein, when the calculation item of the journal data corresponds to energy, data relating to monetary amounts in the journal data is converted into physical quantities prior to calculating the greenhouse gas emissions.

7. In the information processing device, Obtaining accounting data for companies whose greenhouse gas emissions are being calculated, extracting journal data that are the subject of greenhouse gas emission calculations from the accounting data; For those items of the journal data for which the calculation items could not be determined, the calculation items are determined using at least one of the basic corporate information, industry information, and assumed composition ratios of utility costs, water charges, fuel costs, and vehicle costs of the calculation target company; and a program for calculating greenhouse gas emissions for each of the journal data.

8. The program described in claim 7 executes the following: when the calculation items cannot be determined using the basic company information, the calculation items are determined using at least one of the industry information and the assumed composition ratios for utility costs, water charges, fuel costs, and vehicle costs.

9. 9. The program according to claim 7 or 8, which, when the calculation item of the journal data corresponds to energy, converts data relating to monetary amounts in the journal data into physical quantities prior to calculating the greenhouse gas emissions.

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