Renewable energy software & APIs · Kokusai Kogyo
Enegaeru by Kokusai Kogyo combines renewable energy simulation software, APIs and maintained Japanese electricity tariff data. Help customers evaluate solar PV, battery storage, all-electric homes, BEVs and V2H—from residential proposals to commercial and industrial projects.
Published service figures, checked October 3, 2026. Coverage and availability depend on the dataset and contract. Source: Enegaeru’s Japanese website.
Enegaeru is Kokusai Kogyo’s suite of renewable energy simulation software, APIs and Japanese energy databases. It helps companies quantify the value of solar photovoltaic (PV) systems, battery energy storage systems, all-electric homes, battery electric vehicles (BEVs) and vehicle-to-home (V2H).
Use it as a shared calculation foundation for your sales team, dealer network or digital service. Combine local electricity tariffs, equipment characteristics and customer demand to turn a product specification into a business case that customers can understand.
Meet Kokusai Kogyo and Enegaeru →A capable solar or battery product still needs a convincing local proposal. Help sales teams compare equipment, tariffs and ownership costs using consistent assumptions.
Residential solar, storage & electrification →A rooftop, factory or portfolio needs more than a headline payback figure. Compare demand, generation, self-consumption and project economics before advancing the proposal.
Commercial & industrial energy →Japan-specific tariff maintenance and energy calculations can slow a launch. Embed supported APIs in branded calculators, EV charging services and customer platforms.
Renewable energy APIs for Japan →Our aim is to help accelerate renewable energy adoption by reducing the work required to collect data, calculate alternatives and explain an investment. Your team can spend more time developing projects and serving customers.
Connect demand, PV generation, battery operation and grid purchases before calculating the electricity bill. A system’s value depends on when energy is produced and used, as well as the selected tariff.
Explore the calculation approach →ASP distinguishes battery power paths and uses manufacturer-provided specifications, including some values not published in catalogs. Its PV estimates use NEDO METPV20 irradiance data and JIS calculation methods.
See the technical basis →Choose SaaS for a team, APIs for your own application, or BPO for a defined project. Build a repeatable evaluation workflow around supported data and calculations, with specialist delivery where needed.
Choose your delivery model →Technical details above describe published ASP capabilities; API and other product coverage must be matched to the selected specification. Some battery entries use reference values. Technical source (Japanese).
Published service coverage spans electricity plans from 100+ suppliers. Compare supported basic and usage charges, time-of-use rates, fuel adjustments and Japan’s renewable energy surcharge.
Electricity tariff data & APIs →ASP combines irradiance data for 835 locations with a battery product master. Manufacturer-supplied characteristics help reflect usable capacity, charging power, conversion losses and standby consumption.
How residential simulations work →Find smart-energy support programs from national, prefectural and municipal authorities. Search by region and equipment to identify candidates for solar, storage, EV and V2H projects.
Japan smart-energy subsidy database →Updated data matters after launch. The Japanese Biz service publishes a monthly electricity-tariff update cycle; the subsidy API publishes monthly updates. Equipment-master and other dataset updates follow their own release processes. Confirm the dataset, effective dates, delivery method and update terms for your selected service.
Published coverage checked October 3, 2026. Counts vary with updates and do not imply that every plan, product or subsidy is available through every API. Sources: ASP capabilities, Biz tariff updates and subsidy API coverage (Japanese).
| Project or business model | Decision to support | Start here |
|---|---|---|
| Residential PV, home batteries & all-electric homes | Compare electricity and gas costs, solar self-consumption, export revenue and equipment combinations. | Enegaeru ASP → |
| BEVs, home charging & V2H | Compare driving and household energy costs alongside rooftop PV and stationary storage. | EV & V2H → |
| Commercial & industrial on-site solar and storage | Use facility demand to evaluate self-consumption, battery operation and investment economics. | Enegaeru Biz → |
| Customer-owned systems | Assess capital cost, operating assumptions, savings and payback for the asset owner. | Economic simulation support → |
| On-site power purchase agreements (PPAs) | Examine customer benefits and project assumptions; select Biz, a PPA service or tailored BPO to fit the case. | PPA evaluation → |
| Off-site / corporate PPAs | Compare demand facilities, generation assets and supply arrangements, including supplier costs and margins. | Corporate PPA → |
| Leased solar, storage or related equipment | Bring lease payments, maintenance responsibilities, contract duration and end-of-term assumptions for a scoped comparison. | Discuss a lease comparison → |
These are service-selection routes across the Enegaeru portfolio. Lease and complex supply structures require a scope check; they are not presented as universal one-click SaaS features.
Equip a local sales or project team to compare solar, storage, EV and PPA scenarios.
Compare SaaS products →Build the customer journey you want, with agreed Japanese calculations and data behind it.
Explore APIs and data →Ask specialists to prepare a defined analysis or support an implementation workstream.
Explore project support →A published customer interview describes a small team moving from spreadsheet-based work to nearly 300 battery simulations per month.
Read the Japan-market example →Enegaeru API was adopted for the company’s home EV charging service, connecting tariff calculations to a customer-facing experience.
Explore the API example →Review named customer stories to understand the actual product, workflow and scope of each engagement.
Review the evidence →Results are individual customer reports at the time of publication. They are not a forecast for another business. Customer adoption does not imply endorsement of a prospective partner.
Enegaeru is provided by Kokusai Kogyo Co., Ltd., a Japanese geospatial technology and consulting company founded in 1947. A MIRAIT ONE Group company, Kokusai Kogyo operates businesses spanning geospatial information, climate-change countermeasures and urban development.
For market-entry teams, that creates a useful starting point for discussing how location, buildings, energy economics and local implementation could fit together. A portfolio-screening or data-integration project can be scoped around the decision you need to make.
Corporate capabilities are not bundled into every Enegaeru subscription. Dataset access, specialist teams, development work and partner participation are agreed individually.
Visit Kokusai Kogyo’s English website → · Discuss an alliance →
Agree the audience, product, region and decision the first project must support.
Test representative inputs, local conditions, outputs and acceptance criteria before wider deployment.
Confirm integration, licensing, operations, training and ownership of ongoing updates.
This is a proposed engagement approach. Schedule, deliverables and commercial terms are agreed for each project.
Tell us what you want to launch in Japan, who will use it, and where the work is getting stuck. We can discuss the right combination of software, APIs, data and specialist support.