Kioxia just posted the biggest profit jump in Japan — ¥820 billion ($5.16B) year-over-year gain for April–June 2026. That's not a typo. The company topped 1,800 listed firms on pure earnings growth, driven almost entirely by AI-driven demand for NAND flash memory.

Meanwhile, the weak yen continues to work magic for Japanese exporters. Toyota clocked ¥1.48 trillion in net profit. Honda's earnings more than doubled. About 70% of listed companies reported higher profits this quarter.

Two forces at work here: the AI semiconductor cycle is still running hot, and currency tailwinds are amplifying export margins. For anyone tracking supply-chain beneficiaries or momentum in memory stocks, this is a clean data point.

Japan's tech and auto sectors are catching a rare dual tailwind — and the earnings are starting to reflect it.