Founding Taisei: from Okura Kihachiro’s trading house to the industry’s first “construction” name (1873)
What a founding in two layers arrived at
What this founding shows is how strongly the form of a company was dictated by the institutions around it. The civil-engineering arm that began as Okura Kihachiro’s personal trading house was incorporated in 1887 as public works expanded, pushed back into personal ownership in 1892 when the Accounting Law moved government contracts to competitive tender, and only re-established as an independent joint-stock company in 1917. A founding that travelled twice between company and individual suggests that the rules of public procurement — the shift from negotiated contracts to open bidding — were shaping the very shape of a construction firm.
The other thing that comes into view is that Taisei took the postwar dissolution of the zaibatsu as a double transition. Clearing the Okura family’s hold from the capital and raising “construction” over the door as the name of a modern industry proceeded together between 1946 and 1949. A renaming that took “Taisei” from the founder’s posthumous name and loaded it with the sense of building a company collectively marks the point at which a business born of one man’s commercial talent set out again with its management cut loose from any single house.
Read the full dossier in Japanese →
The Japanese edition carries the complete record of this decision — the situation that forced it, the options weighed, what actually followed, and the sources behind every claim.
Other key decisions at Taisei Corporation
- 1946 The zaibatsu dissolution and the renaming to Taisei — rebuilding as a company owned by its employees (1946)
- 1965 Collegial management as a “great synthesis,” and the move to divisional headquarters (1965)
- 1987 Correcting decentralisation: reorganising to stop being a pure contractor (1987)
- 2018 Indicted over the maglev bid-rigging — and denying that it was collusion (2018)
- 2025 Acquiring Toyo Construction, a leading marine contractor, by tender offer (2025)
Yen amounts are converted at the average rate of each figure’s own year — not today’s rate; the revenue chart is shown in yen. Exchange rates & sources — the full ¥/US$ table →
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Data API
Taisei Corporation’s history, financials, executives and
shareholders are published as static JSON — no key, plain GET.
Full specification →
| Method | Endpoint | Returns |
|---|---|---|
| GET | /api/companies.json | All companies |
| GET | /api/1801/manifest.json | Resource index |
| GET | /api/1801/history.json | History overview |
| GET | /api/1801/timeline.json | Chronology |
| GET | /api/decisions.json | All management decisions (index) |
| GET | /api/1801/decisions.json | Management decisions (index) |
| GET | /api/1801/decisions/{slug}.json | One decision (full dossier) |
| GET | /api/1801/executives.json | Executives |
| GET | /api/1801/shareholders.json | Major shareholders |
| GET | /api/1801/financials.json | Financial statements |
| GET | /api/1801/financials-longterm.json | Long-term results |
| GET | /api/1801/segments.json | Business segments |
| GET | /api/1801/regions.json | Sales by region |
| GET | /api/1801/workforce.json | Workforce |