株式会社西海建設
Nagasaki, Japan
Active| Registration number | T2310001000619 |
|---|---|
| Type | Corporation |
| Registered name | 株式会社西海建設 |
| Address | 長崎県長崎市興善町２番８号 2-8 Kozemmachi, Nagasaki-shi, Nagasaki 850-0032, JAPAN |
| Corporate number | 2310001000619 |
| 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) |
|---|---|
| Reading (furigana) | サイカイケンセツ |
| Reading (romaji) | Saikaikensetsu |
| English name (unofficial) | Saikai Kensetsu |
| Postal code | 850-0032 |
Source: NTA Corporate Number Publication Site, refreshed daily.
Company profile (gBizINFO)
| Business lines | D:建設業 |
|---|---|
| Employees | 202 |
Source: gBizINFO (METI), refreshed monthly — edited extract by LoreaTec. Figures are as filed by each company.
Government contract awards (GEPS)
No public national-government (GEPS) award records for this company in the open data (FY2013 to date).
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 (3 lines, sheet years 2024–2025; total ¥725.3M).
| 2025 FY2024 | 水産基盤整備事業（直轄） ¥173.7M （水産庁） 水産資源の生産力を向上させ、水産物の安定供給の確保を図るため、保護礁及び増殖礁等の整備（フロンティア漁場整備事業）を実施。 |
|---|---|
| 2024 FY2023 | 海岸事業（農地） ¥400.2M （農林水産省） 若築建設株式会社九州支店／319,550千円／他43件 |
| 2024 FY2023 | 水産基盤整備事業（直轄） ¥151.4M （水産庁） 水産資源の生産力を向上させ、水産物の安定供給の確保を図るため、保護礁及び増殖礁等の整備（フロンティア漁場整備事業）を実施。 |
Contract details (excerpt): 対馬海峡地区マウンド礁のブロックの製作（その２） ¥173.7M・一般競争契約（総合評価） · bidders 1 ／ ・工事の実施 ¥252.9M・一般競争契約（総合評価） · bidders 6 ／ マウンド礁ブロックの製作 ¥151.4M・一般競争契約（総合評価） · bidders 3 ／ ・工事の実施 ¥147.3M・一般競争契約（総合評価） · bidders 9
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)
| 2023-03-28 | 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/t2310001000619) — Source: National Tax Agency corporate-number and qualified-invoice registries. Retrieved 2026-09-21.
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