Japan Daily Briefing

Japan's Ministry of Finance disclosed it spent ¥15.39 trillion (approximately $103 billion) intervening in FX markets between July 30 and August 26, the largest single monthly intervention in history including coordination with US authorities. Despite the scale, the WisdomTree Japan Hedged ETF's +49bp outperformance over the unhedged version today implies JPY moved weaker rather than stronger during Saturday's session — meaning the market absorbed the intervention news and resumed its view that BoJ rate hikes are too gradual to change the yen's trajectory. Watch 150 on USD/JPY; a break above would trigger speculation of renewed MoF action.

Kioxia Holdings and SanDisk announced a combined $31 billion investment into Japan's semiconductor manufacturing infrastructure for AI applications, one of the largest private capital commitments to Japan's chip sector in memory. The announcement validates Japan's bid to reclaim supply-chain relevance in the global AI buildout — Kioxia produces NAND flash, the storage layer underpinning AI model training. Electronics sector rose +1.03% today. For investors in Japan-exposed names: this is a multi-year tailwind for Japanese semicap equipment (Tokyo Electron, Disco) and a direct read for TOPIX Electronics.

Toyo Keizai's detailed retail investor guide on JGBs this weekend arrives at an uncomfortable moment: BoJ rate hikes are rising faster than individual bond yields are compensating, meaning inflation-adjusted returns on retail JGBs remain negative. The article flags the paradox that higher rates have not translated into a depreciation of existing JGB prices (because BoJ is still controlling the curve via residual YCC mechanisms) — but that window may close. Banks/Financials rising +1.92% today reflects institutional traders pricing in faster NIM expansion as BoJ normalizes, which is the mirror trade to what retail JGB holders are stuck in.