五洋建設株式会社
Tokyo, Japan
Active| Registration number | T1010001000006 |
|---|---|
| Type | Corporation |
| Registered name | 五洋建設株式会社 |
| Address | 東京都文京区後楽2丁目2番8号 2-2-8 Koraku, Bunkyo-ku, Tokyo 112-0004, JAPAN |
| Corporate number | 1010001000006 |
| Corporate number assigned on | 2015-10-05 |
| Invoice registered on | 2023-10-01 |
The invoice registration date is when the qualified-invoice-issuer registration (T-number) took effect — it is not the date the company was founded, and it resets only if the business re-registers after revocation or expiry.
Corporate registry record
| Entity type | Kabushiki Kaisha (stock company) |
|---|---|
| Representative | 代表取締役社長 清 水 琢 三 |
| Reading (furigana) | ゴヨウケンセツ |
| Reading (romaji) | Goyokensetsu |
| English name (unofficial) | Penta-Ocean Construction |
| Postal code | 112-0004 |
Source: NTA Corporate Number Publication Site, refreshed daily. Representative: gBizINFO (METI, monthly).
Company profile (gBizINFO)
| Business summary | 総合建設業 |
|---|---|
| Business lines | D:建設業 |
| Employees | 3,946 (male 3,263 / female 683) |
| Capital | ¥30.45B |
| Incorporated | 1950-04-28 |
| Website | www.penta-ocean.co.jp/ |
Source: gBizINFO (METI), refreshed monthly — edited extract by LoreaTec. Figures are as filed by each company.
Government contract awards (GEPS)
22 national government awards on record between 2016-02-26 and 2026-04-09.
| 2026-04-09 | FY2026 Tokyo Port Port Service Vessel Charter 令和8年度 東京港港湾業務艇用船 |
|---|---|
| 2025-10-31 | 令和7年度中間貯蔵解体廃棄物処分工事(その2) |
| 2025-10-30 | 令和7年度 東京港港湾業務艇用船 |
| 2025-08-25 | 姫島礁灯台船着場災害復旧工事 |
| 2025-07-28 | 令和6年度(補正繰越)大久野島大型土のう搬出他工事 |
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 23 programmes (33 lines, sheet years 2024–2025; total ¥88.32B).
| 2025 FY2024 | 港湾整備事業 ¥15.16B (国土交通省) 工事、発注者支援業務 |
|---|---|
| 2025 FY2024 | 都市水環境整備事業 ¥4.69B (国土交通省) 調査・測量・設計業務・工事 |
| 2025 FY2024 | 海岸事業 ¥2.97B (国土交通省) 工事、発注者支援業務 |
| 2025 FY2024 | 法務省施設の整備充実 ¥2.87B (法務省) 施設の新営、改修等の整備及び施設整備に必要な物品購入等 |
| 2025 FY2024 | 官庁営繕費 ¥2.30B (国土交通省) 工事・調査等 |
| 2025 FY2024 | 特定国有財産の整備(一般会計) ¥2.28B (財務省) 庁舎の建設工事等を実施 |
| 2025 FY2024 | 港湾関係災害復旧事業費 ¥1.76B (国土交通省) 工事、発注者支援業務 |
| 2025 FY2024 | 国立大学法人等施設整備(文教施設費) ¥964.9M (文部科学省) 施設整備事業の執行等 |
| 2025 FY2024 | 警察施設(国費施設)の整備等 ¥876.5M (警察庁) (警察施設の整備に必要な工事を実施) |
| 2025 FY2024 | 道路事業(直轄・交通安全対策) ¥847.6M (国土交通省) 道路の新設・改築/調査検討、設計、発注者支援 等 |
| 2025 FY2024 | 砂防事業 ¥550.0M (国土交通省) 調査・測量・設計業務、工事 |
| 2025 FY2024 | 特定帰還居住区域整備事業 ¥503.1M (復興庁) 除染業務等 |
Contract details (excerpt): その他 ¥11.95B・その他 / 閘門閘室整備工事 ¥4.69B・一般競争契約(総合評価) · bidders 14 / 大阪医療刑務所新営(建築)工事 ¥2.87B・国庫債務負担行為等 / 札幌第4地方合同庁舎の建築工事 ¥2.30B・一般競争契約(総合評価) · bidders 10 / 動物医薬品検査所(22)建築その他工事 ¥2.28B・国庫債務負担行為等 / 令和4年度北九州港(響灘東地区)岸壁(-10m)地盤改良工事 ¥1.15B・一般競争契約(総合評価) · bidders 8
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
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How to cite this page
Data via LoreaTec BizSearch (https://bizsearch.loreatec.jp/t1010001000006) — Source: National Tax Agency corporate-number and qualified-invoice registries. Retrieved 2026-09-24.
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