Japan Daily Briefing

All three Japanese megabanks closed the week with their strongest single-session gains in months: Mizuho Financial (MFG) +4.45% to $11.03, SMFG +4.39% to $26.63, and MUFG +4.30% to $23.54. The common thread is BoJ rate normalization — every 25bps of additional policy rate increases translates directly into NIM expansion for deposit-funded megabanks with decades-long duration mismatches. With 10-year JGB yields having repriced sharply in 2026, the NIM tailwind is structural, not cyclical. Watch for the Q2 FY2026 earnings season in October to confirm loan spread widening is flowing through to reported ROE.

SoftBank ADR (SFTBY) spiked as much as 6.8% early Friday on AI chip enthusiasm — GURUFocus reported the move tied to ARM Holdings' AI inference positioning — before reversing to close down 7.56% at $19.56. The intraday swing of nearly 14 percentage points in a single session illustrates why SoftBank trades like a levered AI options portfolio rather than an operating company. The key variable is the ARM valuation stack: if NVIDIA and hyperscaler AI capex guides lower in Q3 earnings season, SoftBank's book value can crater 15-20% in a week. SoftBank's Vision Fund II exposure adds another layer of mark-to-market risk.

Nexon (NEXOY) announced a special dividend that Seeking Alpha's analysis characterised as a one-time event rather than a shift to sustained shareholder return policy. For Japan-listed gaming names, this distinction matters: a permanent dividend policy change would justify multiple expansion, but a special payout without policy shift is a capital allocation signal — excess cash returned because the company sees limited reinvestment opportunity at acceptable returns. Watch whether the announcement is accompanied by any update on Nexon's Korea operations or its PC gaming vs mobile transition trajectory, which is the genuine long-cycle thesis.