Browse 30,600 energy companies in Japan — registry-sourced from Legal Affairs Bureau, scoped to NACE 35 and 06. Each record carries up to up to 500 firmographic attributes — from Corporate Number and registered address to revenue, headcount and corporate group structure. The largest by revenue are TOKYO GAS ENGINEERING SOLUTIONS CORPORATION ($1.2B), KANDEN GAS AND CO-GENERATION CO., INC. ($940M) and KUROSAWA CONSTRUCTION CO., LTD. ($380M).
Top companies
The largest energy companies in Japan by revenue are TOKYO GAS ENGINEERING SOLUTIONS CORPORATION ($1.2B), KANDEN GAS AND CO-GENERATION CO., INC. ($940M) and KUROSAWA CONSTRUCTION CO., LTD. ($380M). The directory below ranks them — sort any column, or filter by sub-sector, company size and region.
Last updated June 2026.
Every Japanese energy companies record with all attributes, by API, bulk export or CRM enrichment.
Showing 25 of 30,600 Japanese energy companies· click a column to sort, or a company for its full record
| Steam and air conditioning supply | 1,918 | $1.2B | |
| Steam and air conditioning supply | 803 | $940M | |
| Electric power generation, transmission and distribution | 257 | $380M | |
| Electric power generation, transmission and distribution | 100 | $237M | |
| Electric power generation, transmission and distribution | 345 | $200M | |
| Electric power generation, transmission and distribution | 315 | $178M | |
| Electric power generation, transmission and distribution | 343 | $144M | |
| Electric power generation, transmission and distribution | 258 | $143M | |
| Electric power generation, transmission and distribution | 131 | $137M | |
| Steam and air conditioning supply | 314 | $126M | |
| Electric power generation, transmission and distribution | 112 | $102M | |
| Electric power generation, transmission and distribution | 145 | $98M | |
| Electric power generation, transmission and distribution | 284 | $95M | |
| Electric power generation, transmission and distribution | 302 | $94M | |
| Electric power generation, transmission and distribution | 240 | $91M | |
| Electric power generation, transmission and distribution | 229 | $89M | |
| Electric power generation, transmission and distribution | 314 | $89M | |
| Steam and air conditioning supply | 760 | $88M | |
| Electric power generation, transmission and distribution | 122 | $83M | |
| Electric power generation, transmission and distribution | 219 | $79M | |
| Electric power generation, transmission and distribution | 91 | $78M | |
| Steam and air conditioning supply | 69 | $78M | |
| Electric power generation, transmission and distribution | 233 | $75M | |
| Electric power generation, transmission and distribution | 198 | $74M | |
| Electric power generation, transmission and distribution | 103 | $71M |
This is a sample. The full database holds 30,600 Japanese energy companies, each with every attribute in the dictionary below.
Database overview
Distributions across all 30,600 energy companies in Japan — registry-sourced from Legal Affairs Bureau and refreshed daily.
These distributions are computed from the full Japanese energy companies database, not the sample above.
Data coverage
Legal name, registered address, NACE sub-sector, legal form, founding year and website. Every record is keyed to its Corporate Number — the stable Legal Affairs Bureau identifier that survives name changes and rebrands, making it the most reliable CRM deduplication key for Japan data.
Each company is geocoded to GPS coordinates covering its registered seat and operating locations across Japan, with a precision level on every point — useful for territory planning and proximity targeting.
Records carry the Corporate Number and, where applicable, the VAT registration number, with a flag for when the two coincide. These are the cleanest match keys for enriching lists and cross-referencing against the national tax authority and your CRM.
InfobelPRO resolves the corporate hierarchy — parent, subsidiaries and the size of the worldwide corporate family — so sales and compliance teams can see who controls an entity before engaging or onboarding it.
Annual revenue in local currency, EUR and USD, employee headcount and founding year, with multi-year history where filed. Figures are sourced from Legal Affairs Bureau filings and carry an Actual-or-Modeled reliability flag.
Data dictionary
The full field catalogue behind each record. Contact data (email, phone, executives) is part of the licensed dataset but is never displayed on this page.
Source comparison
Legal Affairs Bureau gives you legal registration data. InfobelPRO adds the commercial intelligence sales, marketing and compliance teams actually need.
| Attribute | Legal Affairs BureauFree official registry | InfobelPRO |
|---|---|---|
| Corporate Number | Yes | Yes — on 99.9% of records |
| Legal name & registered address | Yes | Yes |
| Company status (HQ / branch) | Yes | Yes — daily sync |
| NACE sub-sector classification | Yes | Yes — up to 6 codes |
| Annual revenue (local / EUR / USD) | Filings only | Yes — multi-currency |
| Employee count | No | Yes |
| Decision-maker contacts | No | Yes — licensed |
| Geocoded coordinates | No | Yes |
| Corporate group structure | Filings only | Yes — full hierarchy |
| API access | No | Yes — REST API |
| Bulk export (CSV / JSON / Parquet) | No | Yes |
| Update frequency | Periodic (filings) | Daily sync |
FAQ
API access, bulk export or CRM enrichment — 30,600 records with up to up to 500 attributes each.
Explore more
Related directories
See all company directories in Japan, explore the full Japan business database In the US classification, related SIC codes include SIC 4911 — Electric Services, SIC 4923 — Natural Gas Transmission and Distribution and SIC 2097 — Manufactured Ice., or see how Japan fits into the wider Asia business database.
