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Maybe Japan Is Finally Changing for Real ft. Jesper Koll

Reported by Toptradersunplugged
Oct 21, 2026· 3 min read
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Key Takeaways
  • • Jesper Koll, former head of research at J.P. Morgan and Merrill Lynch and advisor to the Governor of Tokyo and occasionally Japan's Finance Minister, argues on Top Traders Unplugged that Japan's structural outlook is improving, citing labor scarcity as a catalyst for corporate change.
  • • Koll contends Japan's debt burden is not a macro problem because the private sector has generated 140 yen of savings for every 100 yen of public debt taken on over the last 20 years, though debt servicing now absorbs nearly a quarter of the government budget.
  • • Koll identifies physical AI and Japanese manufacturing engineering, backed by intellectual property and a weaker yen, as the key drivers of Japan's competitiveness, and points to the Rapidus semiconductor project as a potential high-return investment.
  • • Koll notes Japan has run record balance-of-payments surpluses and remained the world's largest creditor nation, even through the deflationary 1990s.
  • • Corporate shifts such as NTT's move to pay-for-performance and meritocracy are presented as evidence that seniority-based pay is giving way under labor pressure.
Summary
In an episode of the Top Traders Unplugged podcast, host Alan Dunne interviewed Jesper Koll, a long-time Japan macroeconomist and writer of the Substack "Japan Optimist." Koll, who has lived in Japan since the mid-1980s, has held research and strategy roles at S.G. Warburg, J.P. Morgan, Merrill Lynch and Julian Robertson's Tiger Fund, and currently works with the activist fund Manx Group. He said he began the Japan Optimist while at J.P. Morgan, when Japan was sinking into deflation and prominent economists were offering pessimistic advice.

Koll argued that Japan's fundamentals remain strong. He cited continued record balance-of-payments surpluses and the country's status as the world's largest creditor nation as evidence of underlying strength. He said Japan is not competing in artificial intelligence but is well positioned in "physical AI," translating digital intelligence into manufacturing and industrial applications, and that a weaker yen has made Japanese manufacturers highly competitive globally.

On demographics, Koll acknowledged that the average age in Japan is now around 50 and that one in three people lives on a pension, which weighs on national income and GDP. He argued, however, that investors should focus on macro dynamics and corporate fundamentals. He said labor scarcity is forcing companies to change incentives, citing NTT's introduction of pay-for-performance and meritocracy as a shift away from seniority-based pay. He argued that productivity gains will come from motivating human capital rather than from purchasing AI.

On debt, Koll said Japan does not face a debt problem in the macroeconomic sense, contrasting its excess domestic savings with the UK's reliance on foreign capital. He said that for every 100 yen of public debt added over the past two decades, the private sector generated 140 yen of savings, held largely as corporate cash and household deposits. He noted, however, that debt service now consumes close to one quarter of Prime Minister Takaichi's budget, and that rising rates would increase that burden. Koll also pointed to the Rapidus semiconductor project as an example of the concrete, high-return investments he wants the government to prioritize, warning that otherwise spending risks becoming "pork barrel politics." The transcript excerpt ends before Koll answers Dunne's question on where domestic savings are flowing as 30-year JGB yields have risen from near 0% to around 4%.

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Toptradersunplugged Maybe Japan Is Finally Changing for Real ft. Jesper Koll