Japan's Big Stocks Soar While Small Caps Get Left Behind

$320 billion has flooded into Japanese stocks since the election, but not everyone's invited to the party.

While Japan's blue chips hit record highs almost daily since Prime Minister Takaichi's historic win, a closer look at the Tokyo Stock Exchange reveals a tale of two markets. The Prime, Standard, and Growth market indexes show a stark divide: large caps are soaring while smaller companies and startups are stuck in neutral.

The Flight to Liquid Safety

Foreign investors are buying Japanese stocks at their fastest pace in 11 years. But their shopping list is highly selective. They want Sony, Toyota, and SoftBank – names they recognize, companies with deep liquidity pools they can exit quickly if needed.

Meanwhile, innovative smaller firms with cutting-edge tech are watching from the sidelines. The money simply isn't trickling down.

Two forces are driving this divergence. First, AI anxiety. Investors believe large corporations have the resources to adapt to rapid technological change, while smaller players might get crushed. Second, trade policy uncertainty. Takaichi's aggressive stance on trade could hurt smaller exporters disproportionately.

The Governance Reform Paradox

Ironically, Japan's corporate governance reforms – designed to make companies more shareholder-friendly – are amplifying the big-stock bias. Institutional investors prefer companies that tick all the ESG boxes and have robust disclosure practices.

Large corporations can afford compliance teams and investor relations departments. Smaller companies? They're struggling to keep up with the paperwork while trying to innovate and grow.

This creates a feedback loop. Better governance attracts more capital, which enables even better governance, leaving smaller players further behind.

What American Investors Should Watch

For US investors eyeing Japanese opportunities, this divergence creates both risks and opportunities. ETFs tracking broad Japanese indexes are heavily weighted toward large caps, so they're riding the Takaichi wave. But they're also missing potential gems among smaller companies.

The parallel to US markets is striking. During periods of uncertainty, American investors also flee to mega-cap tech stocks while small caps languish. The difference is that Japan's small-cap ecosystem is less developed, making the divide more pronounced.