DeNA

The founder returns: Tomoko Namba, and an AI pivot (2026)

Key decision·2026· DeNA — the full company history →

A bet called the second founding

The implication of returning the founder to the presidency is that it was not a change to hold anyone accountable for results but a decision to walk back into the fire herself, on the far side of a large profit. Namba had handed management to Moriyasu in 2011 and to Okamura in 2021, advancing a generational handover twice. To swing that flow into reverse for once and return to a structure in which the founder stands at the front, for a fixed term, was likely because she judged that the speed of decision-making, and the drawing power to push back the market’s low valuation, had to be regained now, by her own hand. It is a bet fit to be called a second founding.

Whether the bet pays off hinges on whether the policy of concentrating resources on AI reaches beyond efficiency to give rise to new businesses. While holding up “permanent venture,” DeNA has faced the distortions of a culture in a hurry to grow — the loss of trust at WelQ, the 2021 change of president. This return, too, lies on the extension of the same problems: earnings that swing on a single title, and new businesses that never quite grow up. Can a way in which the founder leads change for a set period regain, at once, speed and challenge for a company that has matured — including a shift to a non-pyramid organisation? At the time of writing, the answer is not yet in.

Revenue and net margin, FY2021–FY2026

Revenue in ¥ bn (bars) and net margin in % (line), for the years around the decision. Shaded columns are FY2026 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 DeNA


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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  • Sources are primarily each company’s securities reports and other public filings, but errors and omissions may remain.
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Data API

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Method Endpoint Returns
GET /api/companies.json All companies
GET /api/2432/manifest.json Resource index
GET /api/2432/history.json History overview
GET /api/2432/timeline.json Chronology
GET /api/decisions.json All management decisions (index)
GET /api/2432/decisions.json Management decisions (index)
GET /api/2432/decisions/{slug}.json One decision (full dossier)
GET /api/2432/executives.json Executives
GET /api/2432/shareholders.json Major shareholders
GET /api/2432/financials.json Financial statements
GET /api/2432/financials-longterm.json Long-term results
GET /api/2432/segments.json Business segments
GET /api/2432/regions.json Sales by region
GET /api/2432/workforce.json Workforce