株式会社西原環境
Tokyo, Japan
Active| Registration number | T5010401023437 |
|---|---|
| Type | Corporation |
| Registered name | 株式会社西原環境 |
| Address | 東京都港区海岸３丁目２０番２０号 3-20-20 Kaigan, Minato-ku, Tokyo 105-0022, JAPAN |
| Corporate number | 5010401023437 |
| Corporate number assigned on | 2015-10-05 |
| Invoice registered on | 2023-10-01 |
Invoice registration date = when the T-number took effect, not the founding date.
Corporate registry record
| Entity type | Kabushiki Kaisha (stock company) |
|---|---|
| Representative | 代表取締役 西原 幸志 |
| Reading (furigana) | ニシハラカンキョウ |
| Reading (romaji) | Nishiharakankyo |
| English name (unofficial) | Nishihara Environment |
| Postal code | 108-0022 |
Source: NTA Corporate Number Publication Site, refreshed daily. Representative: gBizINFO (METI, monthly).
Company profile (gBizINFO)
| Business summary | 水事業（自治体向け・産業向け） |
|---|---|
| Business lines | F:電気・ガス・熱供給・水道業 |
| Employees | 640 （male 552 / female 88） |
| Incorporated | 1964-02-04 |
| Website | www.nishihara.co.jp |
Source: gBizINFO (METI), refreshed monthly — edited extract by LoreaTec. Figures are as filed by each company.
Government contract awards (GEPS)
8 national government awards on record between 2020-09-11 and 2026-04-07.
| 2026-04-07 | FY2026 Imperial Palace Outer Garden Purification Facility Coagulant and Other Purchases 令和８年度皇居外苑浄化施設凝集剤他購入 |
|---|---|
| 2024-04-15 | 令和６年度皇居外苑浄化施設凝集剤他購入 |
| 2023-10-20 | 中水処理設備補修役務 |
| 2023-04-05 | 令和５年度皇居外苑浄化施設凝集剤他購入 |
| 2022-04-06 | 令和４年度皇居外苑浄化施設凝集剤他購入 |
Full award history on Japan Tenders →
出典：調達ポータル（https://www.p-portal.go.jp/）
Payments from national budget programmes (行政事業レビュー)
Ministry review sheets report this company as a payee of 2 programmes (2 lines, sheet years 2025–2025; total ¥228.4M).
| 2025 FY2024 | 休廃止鉱山鉱害防止工事等支援事業 ¥147.3M （経済産業省） 事業の実施 |
|---|---|
| 2025 FY2024 | 市ヶ谷地区の維持管理に要する経費 ¥81.2M （防衛省） 役務等 |
Contract details (excerpt): 元山鉱山における野谷坑廃水処理場改修工事（５年度繰越） ¥99.5M・一般競争契約（最低価格） · bidders 2 ／ 元山鉱山における野谷坑廃水処理場改修工事（６年度） ¥47.8M・一般競争契約（最低価格） · bidders 2 ／ 汚泥貯留槽等整備役務 ¥47.0M・一般競争契約（最低価格） · bidders 1 ／ 中水設備整備役務 ¥34.2M・一般競争契約（最低価格） · bidders 1
Source: 行政事業レビュー見える化サイト (Cabinet Secretariat, PDL 1.0) — edited extract by LoreaTec. A sheet year describes the previous fiscal year’s spending. Programme database →
Licenses, registrations & certifications (gBizINFO)
| 2023-03-27 | Government bidding qualification (統一資格) 企業 ／ 施設課経理係 （Ministry of Justice） |
|---|---|
| 2021-04-01 | Government bidding qualification (統一資格) 企業 ／ 施設課経理係 （Ministry of Justice） |
| 2019-04-01 | Government bidding qualification (統一資格) 企業 ／ 施設課経理係 （Ministry of Justice） |
Source: gBizINFO (METI) notifications & certifications dataset, refreshed monthly. Some licenses (e.g. construction 建設業許可, electrician registrations) are not part of the gBizINFO dataset.
Verify in official sources
How to cite this page
Data via LoreaTec BizSearch (https://bizsearch.loreatec.jp/t5010401023437) — Source: National Tax Agency corporate-number and qualified-invoice registries. Retrieved 2026-11-08.
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