株式会社窓研
Ibaraki, Japan
Active| Registration number | T4050001011228 |
|---|---|
| Type | Corporation |
| Registered name | 株式会社窓研 |
| Address | 茨城県土浦市木田余東台３丁目２５番９号 3-25-9 Kidamarihigashidai, Tsuchiura-shi, Ibaraki 300-0027, JAPAN |
| Corporate number | 4050001011228 |
| Corporate number assigned on | 2015-10-05 |
| Invoice registered on | 2023-10-01 |
| Record last updated | 2025-04-25 |
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) | ソウケン |
| Reading (romaji) | Soken |
| English name (unofficial) | Madoken |
| Postal code | 300-0027 |
Source: NTA Corporate Number Publication Site, refreshed daily.
Timeline — registry changes
| 2025-03-05 | Name changed |
|---|
Source: daily change files of the NTA Corporate Number Publication Site. Before 2023-08-16 only the latest change is known. All company events →
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/）
Subsidies & grants received (gBizINFO)
3 published awards (2021-08-16 → 2023-11-15, 2 programmes, total ¥1.3M).
| 2023-11-15 | 令和５年度 住宅エコリフォーム推進事業 ¥288,000 （国土交通省） |
|---|---|
| 2023-09-12 | 令和５年度 住宅エコリフォーム推進事業 ¥208,000 （国土交通省） |
| 2021-08-16 | 働き方改革推進支援助成金 ¥798,000 （厚生労働省） |
Source: gBizINFO (METI) subsidy information, refreshed monthly. Amounts as published (grant decisions). Subsidies database →
Licenses, registrations & certifications (gBizINFO)
| Construction business license Glass works・Fittings works ／ General contractor・Ibaraki Governor license No. 035817 （Ibaraki） |
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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Verifying the invoice number is step one. Our guide covers the full checklist: corporate registry, licenses, and import/export standing.
How to cite this page
Data via LoreaTec BizSearch (https://bizsearch.loreatec.jp/t4050001011228) — Source: National Tax Agency corporate-number and qualified-invoice registries. Retrieved 2026-09-21.
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