Company lists · Data refreshed September 2026

Top 25 Renewable energy system integrators based in Japan

Name: Renewable energy system integrators based in Japan
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 127 companies tracked

RevenueBase identified 127 company matches for renewable energy system integrators associated with Japan as of September 2026 and tracks 818 professional contacts across them, including 151 with verified work emails. Jing is the largest hub.

This list covers company matches for renewable energy system integrators associated with Japan, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 17, 2026 How this list was built

127Companies

818Contacts tracked

151Verified emails

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The 25 largest renewable energy system integrators based in Japan

Ranked by team size

Top 25 of 127 company matches for renewable energy system integrators based in Japan, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Renova, INC	Exact match	Chuo-ku, JapanHQ recorded Sep 17, 2026	201-500	130 contacts →
	Exact match “RENOVA is an independent renewable energy developer and power producer.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Eneos Renewable Energy Corporation	Exact match	Tokyo, JapanHQ recorded Sep 17, 2026	501-1,000	81 contacts →
	Exact match “Preliminary surveys, planning, design, materials procurement and sales, civil engineering, construction, operation, maintenance and inspection work, and electric power sales…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Gpss Group	Exact match	港区, JapanHQ recorded Sep 17, 2026	201-500	67 contacts →
	Exact match “GPSS Holdings Inc is a Tokyo-based renewable energy company which constructs, operates and maintains solar, geothermal, wind, biogas and small-hydroelectric power plants.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Gbp株式会社	Exact match	千代田区, JapanHQ recorded Sep 17, 2026	51-200	37 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Pacifico Energy K.K	Exact match	港区, JapanHQ recorded Sep 17, 2026	51-200	33 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	(株)キューデン・インターナショナル	Exact match	福岡市　中央区, JapanHQ recorded Sep 17, 2026	11-50	27 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Yanmar Energy System Japan	Exact match	千代田区, JapanHQ recorded Sep 17, 2026	501-1,000	21 contacts →
	Exact match “We YANMAR ENERGY SYSTEM offer a wide range of services in the power generation business, from designing power generation facilities on order to contracting small- and medium-scale…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Sunergy Global Services S.L	Exact match	Tokyo, JapanHQ recorded Sep 17, 2026	51-200	21 contacts →
	Exact match “SUNERGY nace de la unión de varias empresas del sector del montaje.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Iwatec Corporation	Exact match	Nagasaki, JapanHQ recorded Sep 17, 2026	51-200	14 contacts →
	Exact match “Iwatec Corporation is a Japan-based engineering and consultancy firm powering the global shift to renewable energy.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	R&l Co., LTD	Exact match	Chuo-ku, JapanHQ recorded Sep 17, 2026	51-200	13 contacts →
	Exact match “German Standards and Engineering.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Smart Energy Co., LTD	Exact match	中央区, JapanHQ recorded Sep 17, 2026	201-500	9 contacts →
	Exact match “Provide O&M services for Solar Panels and Wind Turbines.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Q.Enest Denki Co., LTD	Exact match	港区, JapanHQ recorded Sep 17, 2026	11-50	8 contacts →
	Exact match “As the Japanese retail branch of global solar energy conglomerate, Q CELLS, we provide green energy products to residential and commercial customers.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Nippon Renewable Energy K.K	Exact match	Tokyo, JapanHQ recorded Sep 17, 2026	11-50	7 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Biopower	Exact match	Tokio, JapanHQ recorded Sep 17, 2026	11-50	6 contacts →
	Exact match “BioPower is a Spanish-Japanese renewable energy company whose actions are directed towards the development, construction and operation of photovoltaic solar energy projects.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Clean Energy Connect	Exact match	Chiyoda-ku, JapanHQ recorded Sep 17, 2026	11-50	5 contacts →
	Exact match “Clean Energy Connect Inc.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Quantum Group Engineering & Capital Applied To Renewable Energy Solutions	Exact match	Minato-ku, JapanHQ recorded Sep 17, 2026	51-200	5 contacts →
	Exact match “Quantum Group is a company in the renewable energy industry (wind, solar, bioenergy, micro hydraulic) providing project development, financing, Engineering, EPC Contracting and…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Infipower インフィパワー	Exact match	Yokohama, JapanHQ recorded Sep 17, 2026	1-10	5 contacts →
	Exact match “We are looking for full stack SW engineer(Why ful stack?” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	REZIL	Exact match	Tokyo, JapanHQ recorded Sep 17, 2026	201-500	3 contacts →
	Exact match “Rezil is on a mission to make decarbonization effortless.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Eneglobal Co., LTD	Exact match	Tokyo, JapanHQ recorded Sep 17, 2026	11-50	3 contacts →
	Exact match “We are a manufacturer of renewable energy.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	テス・エンジニアリング株式会社	Exact match	大阪市淀川区, JapanHQ recorded Sep 17, 2026	201-500	3 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	DAN Corporation, LTD	Exact match	Tokyo, JapanHQ recorded Sep 17, 2026	1-10	3 contacts →
	Exact match “Renewable energy investment venture.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Krannich Solar Japan	Exact match	1-7-25 Marunouchi, JapanHQ recorded Sep 17, 2026	201-500	2 contacts →
	Exact match “About Krannich Solar Krannich Solar has been a reliable partner to photovoltaic installers since 1995, offering everything the industry needs for a bright future: sound advice…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	エナジー・ソリューションズ(株)	Exact match	千代田区, JapanHQ recorded Sep 17, 2026	11-50	2 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Powerguard Co., LTD	Exact match	Fukuoka, JapanHQ recorded Sep 17, 2026	11-50	1 contacts →
	Exact match “Renewable energy operations & maintenance” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	鈴木電機(株)	Exact match	JapanHQ recorded Sep 17, 2026	11-50	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “renewable energy system integrators”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 127 renewable energy system integrators based in Japan

See the full list, filter by size, metro and specialty, and access 151 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Renewable energy system integrators based in Japan at a glance

As of Sep 17, 2026

18.5%Verified-email coverage

6.4Average contacts per company

11-50Median size (employees)

15.0%Largest-city concentration · Jing

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Japan, so it is reported there. Company counts and contact totals on this page are exact for Japan, over 127 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Japan whose business descriptions match “renewable energy system integrators” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 151 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 17, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “renewable energy system integrators”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many renewable energy system integrators are there based in Japan?

RevenueBase identified 127 company matches for renewable energy system integrators associated with Japan as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Renova, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most renewable energy system integrators?

Jing leads with 19 company records, followed by Xian (15) and Tokyo (12).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 151 professional contacts with verified work emails tracked across these 127 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.