AI and the compute infrastructure boom

Morgan Stanley MUFG ’s Japan Equity Strategist Sho Nakazawa talks about the sectors that are leading the current rebound of Japanese stocks and why these gains may be more than a cyclical shift.

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Welcome to Thoughts on the Market. I’m Sho Nakazawa, Japan Equity Strategist at Morgan Stanley MUFG Securities.

Today: How Japan’s Takaichi administration could define Japan’s stock market for years to come.

It’s Tuesday, March 17th, at 3 PM in Tokyo.

Sanae Takaichi became Japan's first female prime minister on October 21, 2025. She leads a conservative administration that emphasizes defense spending and economic resilience. When Takaichi took office in February, this signaled the start of a structural pivot in Japan’s economy. And markets have responded quickly. Over the past several months, stocks with high exposure to the administration’s 17 strategic domains have outperformed TOPIX by 15 percentage points. That kind of divergence suggests something bigger than a cyclical rebound. Capital is positioned to a structural shift. 

First, there’s the Japanese government’s increased emphasis on economic security and supply chain resilience. This reflects a philosophical shift. For years efficiency ruled: just-in-time supply chains and global optimization. The pandemic and the reorientation towards a multipolar world changed that workflow. Now the emphasis is on redundancy and autonomy – and this has implications for Defense & Space, Advanced Materials & Critical Minerals, Shipbuilding, and Cybersecurity. 

The second pillar of Japan’s structural market shift is AI and the compute revolution. Yes, some investors worry about overinvestment in AI, but we believe in [the] possibility of nonlinear returns as AI breakthroughs occur. And, keep in mind, AI isn’t just software. It requires data-center cooling, communications networks, expanded power grids, and critical minerals. This is a full industrial stack upgrade. Looking further out, the global humanoid robotics market could reach US$7.5 trillion annually by 2050 according to our global robotics team estimates. That’s roughly three times the combined 2024 revenue of the world’s top 20 automakers at about US$2.5 trillion. 

The third force reshaping Japan’s market is infrastructure. The 2026 budget slated towards national resilience initiatives exceeds ¥5 trillion. With aging infrastructure and intensifying natural disasters, resilience spending relates directly to economic security. Ports, logistics, and communications systems are increasingly becoming strategic assets. Our work suggests the long-term construction cycle is entering an expansion phase as bubble-era buildings from the late 1980s reach replacement timing. That points to durable demand rather than a temporary spike. 

With all of this said, what’s also important is how stock market leadership spreads. It tends to move from upstream to downstream – from materials and power infrastructure, to AI, to defense and communications, and eventually to applications like drug discovery, quantum technologies, cybersecurity, and content. Right now, the strongest three-month returns are in Advanced Materials and Critical Minerals, and in Next-Gen Power and Grid Infrastructure. Meanwhile, areas like Cybersecurity and Content have lagged but remain tightly connected in the network. If leadership broadens, those linkages matter. 

The real constraint isn’t political opposition. It’s [the] market itself. If investors decide this is a temporary stimulus rather than sustainable earnings growth, valuations might adjust. But we do believe that Japan’s equity market isn’t simply rallying. It is reorganizing around economic security, AI infrastructure, and national resilience.

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