The Yahoo Japan joint venture with America’s Yahoo (1996)
A share plucked from an information network that set the company’s value
The heart of this decision lies less in launching a search portal in Japan than in concentrating capital on a small, unproven venture on the strength of nothing but a conviction drawn from an information network. Neither the ¥200 million of 1995 nor the ¥10 billion of 1996 could be justified by working back from the scale of the business at the time. SoftBank could commit those sums because, at the far end of the information network built through the Ziff-Davis acquisition, it could make out the shape of the technology coming next. The logic of betting not on an acquisition target’s earnings but on the information gleaned from it here bore its first fruit.
Just as weighty is that this single episode set the group’s corporate value itself. During the internet bubble, SoftBank’s market capitalization rested not on its own operations but on the unrealized gains tied to Yahoo, and that valuation swayed as the share price turned. That a stake picked up for ¥200 million turned into unrealized gains of trillions of yen shows Son Masayoshi’s nose as an investor, and at the same time carried the danger of entrusting corporate value to another company’s share price. The bet on an unknown company found at the far end of an information network, one can say, shaped what SoftBank would look like for a long time after.
Revenue and net margin, FY1991–FY2001
Revenue in ¥ bn (bars) and net margin in % (line), for the years around the decision. Shaded columns are FY1996 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 SoftBank Group
- 1981 Founding Nihon SoftBank: a PC-software wholesaling business (1981)
- 2000 Shrinking the balance sheet through the dot-com crash (2000)
- 2001 Entering ADSL, and the Yahoo! BB crisis (2001)
- 2016 Buying Britain’s ARM: a record acquisition for the IoT and AI age (2016)
- 2017 Forming the SoftBank Vision Fund (2017)
- 2025 The giant OpenAI stake and the Stargate AI infrastructure (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.
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- 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.
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Data API
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| Method | Endpoint | Returns |
|---|---|---|
| GET | /api/companies.json | All companies |
| GET | /api/9984/manifest.json | Resource index |
| GET | /api/9984/history.json | History overview |
| GET | /api/9984/timeline.json | Chronology |
| GET | /api/decisions.json | All management decisions (index) |
| GET | /api/9984/decisions.json | Management decisions (index) |
| GET | /api/9984/decisions/{slug}.json | One decision (full dossier) |
| GET | /api/9984/executives.json | Executives |
| GET | /api/9984/shareholders.json | Major shareholders |
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| GET | /api/9984/financials-longterm.json | Long-term results |
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