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The Long Shadow of Japan’s Monetary Experiment

Here's everything you need to know about the history of Japanese Monetary Policy

Updated Oct 19, 20251 min readBOJMonetary PolicyYenYield CurveMacro

Here's everything you need to know about the history of Japanese Monetary Policy

Executive Summary Japan’s monetary policy over the past three decades represents the most prolonged experiment in financial repression in modern economic history. The Bank of Japan (BoJ) has journeyed from orthodox rate management to outright market engineering—deploying zero interest rates, negative rates, multiple rounds of quantitative and qualitative easing (QQE), yield-curve control (YCC), and unprecedented equity ETF purchases. This long-running campaign bought time, but not transformation. The economy remains trapped in structural low growth, anchored inflation expectations, and an aging demographic drag. Meanwhile, the policy toolkit has become self-referential—an ecosystem addicted to stimulus. In this note, we unpack Japan’s monetary evolution, evaluate the mechanics and limits of its unconventional playbook, and assess what the BoJ’s gradual exit means for investors across JGB


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