Prof. Koshizuka on Data Sovereignty and Japan's Distributed AI Infrastructure

University of Tokyo Professor Noboru Koshizuka on Japan’s data sovereignty strategy and the founding of the xIPF consortium to build a distributed AI execution layer.

• Data carries no ownership — only control rights. Sovereignty is a question of who holds that control.
• AI quality is increasingly a function of data, not mechanism; the data dependency ratio is rising fast.
• The French model is instructive: use hyperscaler cloud infrastructure, but have domestic entities operate it under Japanese law.
• AI will eventually run distributed across one million nodes throughout Japan; centralized data center architecture is a transitional phase.
• The xIPF consortium was incorporated on April 10. NTT Data, SoftBank, NEC, Fujitsu, and roughly 30 other companies have joined, with Koshizuka as chair.
• Fragmented institutional formats — such as school report card schemas that vary school by school — are a concrete bottleneck blocking digital transformation.
• Japan should pursue its own path, neither EU-style nor US-style, and position itself as a leadership model for Southeast Asian development.
• AI has become a national security issue that transcends economics. Koshizuka supports reviving government-led industrial coordination to match.

2026-04-21 · Watch on YouTube

Japanese page: 越塚登教授：データ主権とAI分散基盤