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TSMC Plans 3nm Production in Japan With $17 Billion Kumamoto Upgrade

Tokyo pledges support for the upgrade pending TSMC’s formal approval.

Overview

  • TSMC informed Japan it intends to shift the under‑construction Kumamoto Fab 2 from a 6–12nm plan to mass‑producing 3nm chips in Kikuyo.
  • Chair C. C. Wei outlined the plan in a meeting with Prime Minister Sanae Takaichi, which would establish Japan’s first 3nm manufacturing site.
  • The investment for the second Kumamoto plant rises to $17 billion from $12.2 billion, with detailed discussions to proceed with METI before final sign‑off.
  • Japan currently lacks domestic 3nm capacity, and the project is expected to bolster supply for AI data centers, advanced manufacturing robots, and autonomous driving.
  • The move aligns with TSMC’s larger 2026 capex plan of up to $56 billion and a diversification strategy that analysts say hedges geopolitical and tariff risks.