Micron Breaks Ground on $9 Billion Plant Expansion in Japan

What happened

Micron Technology broke ground on July 4, 2026 on a ¥1.5 trillion ($9.3B) factory expansion in Hiroshima, Japan. The facility will manufacture high-bandwidth memory (HBM) critical for AI processors, primarily Nvidia GPUs.

Context and impact

HBM is one of the key bottlenecks in AI infrastructure — its capacity directly limits AI server performance and training cluster throughput. Micron enters into direct competition with SK Hynix and Samsung, which currently dominate the HBM market. The massive investment signals continued strong AI memory demand despite ongoing AI bubble debates.

Details

• Total investment: ¥1.5 trillion (≈$9.3B USD)
• Location: Hiroshima, Japan (expansion of existing facility)
• Product: High-Bandwidth Memory (HBM) for AI GPUs, primarily Nvidia
• Expected shipment start: summer 2028
• Japan's METI contributing up to ¥500 billion in government support
• Micron competes directly with SK Hynix and Samsung in the HBM segment