Japan’s power semiconductor sector, once a global stronghold, is losing ground to fast-rising Chinese rivals as stalled consolidation and mounting financial pressures undermine its competitiveness. Talks between Toshiba and Rohm — two of Japan’s five leading power semiconductor firms — have stalled, highlighting how fragmentation is preventing Japan from countering China’s increasingly aggressive push.

China’s fiercely competitive auto market is entering a new phase of high-stakes rivalry, with two private-sector titans — Geely Automobile and BYD — locked in an increasingly intense battle for dominance.