A company that idealized the owner-run shop lists on the Tokyo Stock Exchange (2006)
The need for funding, and the need to change the shape of the company
The motive for listing changed places over time. Right after the 1998 rating, the problem was that the only road to funding ran through the banks. Yet by 2005 Tenbo Akihiko was saying that the financial climate had improved dramatically and the banks now wanted to lend. Even so, calling the listing off was no longer an option — because what had begun as a need for money had become a need to change the balance sheet itself: to lift the equity ratio to the level of the company’s peers and to be able to raise funds from the capital markets and the bond market alike. At the same time, those five years were an exercise in diluting the founding family’s control. That two separate objectives demanded the same instrument is why a plan once returned to a blank sheet went through at the second attempt.
Revenue and net margin, FY2000–FY2010
Revenue in ¥ bn (bars) and net margin in % (line), for the years around the decision. Shaded columns are FY2005 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 Idemitsu Kosan
- 1911 Founding Idemitsu Shokai in Moji: from peddling machine oil to the sea and the continent (1911)
- 1953 Standing against the international oil cartel: the independent line (1953)
- 2000 The first outside capital in thirty-seven years — and a listing cancelled by one word from the chairman (2000)
- 2017 A 30% public offering against the founding family’s opposition to the Showa Shell merger (2017)
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
Idemitsu Kosan’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/5019/manifest.json | Resource index |
| GET | /api/5019/history.json | History overview |
| GET | /api/5019/timeline.json | Chronology |
| GET | /api/decisions.json | All management decisions (index) |
| GET | /api/5019/decisions.json | Management decisions (index) |
| GET | /api/5019/decisions/{slug}.json | One decision (full dossier) |
| GET | /api/5019/executives.json | Executives |
| GET | /api/5019/shareholders.json | Major shareholders |
| GET | /api/5019/financials.json | Financial statements |
| GET | /api/5019/financials-longterm.json | Long-term results |
| GET | /api/5019/segments.json | Business segments |
| GET | /api/5019/regions.json | Sales by region |
| GET | /api/5019/workforce.json | Workforce |