Nikkei 225 rises on AI chip stocks

For investors, that concentration is both an opportunity and a warning. It confirms that the Nikkei remains one of the cleanest proxies for the global AI capex cycle, which means dips in U.S. chip sentiment can quickly spill into Japanese equities. But it also means the index can mask weakness underneath, where banks and real estate names tied to Japan’s domestic economy were among the decliners. The Topix rose only 0.55%, underscoring how much of the day’s strength came from a handful of mega-cap growth names rather than a healthier market-wide advance.

The move also highlights the market’s current preference for balance-sheet-light, export-driven winners over rate-sensitive domestic sectors. As long as U.S. AI and semiconductor spending remains elevated, Japan’s equipment makers and strategic holders of tech assets should continue to attract incremental foreign inflows. That makes the Japanese market a second-order beneficiary of the AI buildout, not just a local story.

The opportunity, in our view, remains in the picks-and-shovels names linked to global chip demand and in broad Japan exposure that can capture them. But the weak breadth is a reminder to stay selective: the next leg higher will likely depend on whether gains broaden beyond SoftBank, Advantest and Tokyo Electron, or whether the Nikkei keeps rising on an increasingly narrow foundation.