Indicted over the maglev bid-rigging — and denying that it was collusion (2018)
The author’s view
There was a logic of its own to Taisei’s denial: on the projects that mattered most, it had lost. In a peculiar form of tendering where both the winner and the price rest on the client’s discretion, at what point does exchanging information become illegal collusion? The attempt to have that line drawn in court can be read as raising a question different from mere defiance. The distance between Taisei and the two firms that admitted the charge and hurried to close the matter was also a difference in how they saw the facts.
Even so, the company itself acknowledged that order co-ordination had taken place, and the weight of that remains: at the height of record profits, the arrangement by which difficult work was shared out had not broken down. Choosing to fight from inside rather than open the matter to outside investigation also, apart from the case argued in court, deferred the chance to release the company from the closed logic of its industry. How that decision has worked on the rebuilding of trust is something still to be judged against the orders it wins and the way it is actually governed.
Revenue and net margin, FY2013–FY2023
Revenue in ¥ bn (bars) and net margin in % (line), for the years around the decision. Shaded columns are FY2018 onwards — after it was taken.
Source: securities reports
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
- 1873 Founding Taisei: from Okura Kihachiro’s trading house to the industry’s first “construction” name (1873)
- 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)
- 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 →
Disclaimer
- This page is provided for general information only and is not investment advice, nor a recommendation to buy or sell any security.
- Figures are compiled independently and include our own estimates, approximations and machine-processed data; we make no warranty as to their accuracy or completeness.
- Sources are primarily each company’s securities reports and other public filings, but errors and omissions may remain.
- Any use of this information is at the reader’s own risk. Past performance does not indicate future results.
- Company names, logos and other marks belong to their respective owners.
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 |