CoinTelegraph
Micron has broken ground on a $9.3 billion expansion of its Hiroshima-area chip plant in Japan, with the new fab dedicated to advanced AI memory chips, including high-bandwidth memory used in NVIDIA-class accelerators.
Why it matters
The build is the largest single foreign semiconductor capex announcement Japan has hosted this year and locks Micron into a multi-year HBM ramp just as Korean rivals SK hynix and Samsung are absorbing the bulk of accelerator-grade memory demand. Japanese government subsidies are understood to be underwriting a meaningful share of the capex, a pattern Tokyo has used to pull advanced-node fabs onshore since the 2022 CHIPS-era recalibration. The Hiroshima site is one of the few advanced memory footprints outside Korea and Taiwan with credible HBM roadmaps.
Market impact
Capacity is not expected online until the second half of 2027, so the move does not ease the current HBM squeeze that has been a gating factor on AI accelerator shipments. What it does is extend Micron's option value into the back half of the next leg of the cycle, and signals that management is betting the AI memory bottleneck persists rather than breaks. Watch for follow-on supply contracts with hyperscalers and accelerator vendors as the build progresses.
Frequently asked questions
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What is Micron building in Japan?
A $9.3 billion expansion of its Hiroshima-area chip plant dedicated to advanced AI memory chips, including high-bandwidth memory used in NVIDIA-class accelerators.
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When will the new capacity come online?
Not until the second half of 2027, so the build does not ease the current HBM squeeze that has been constraining AI accelerator shipments.
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Who is funding the expansion?
Japanese government subsidies are understood to be underwriting a meaningful share of the $9.3 billion capex, consistent with Tokyo's CHIPS-era strategy to onshore advanced semiconductor manufacturing.
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Why does this matter for the AI memory market?
It extends Micron's option value into the back half of the next cycle and signals management is betting the HBM bottleneck persists beyond the current ramp, while SK hynix and Samsung still absorb most accelerator-grade demand today.
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Is Hiroshima strategically significant?
Yes. It is one of the few advanced memory footprints outside Korea and Taiwan with credible HBM roadmaps, which is why Japanese public capital is supporting the build.
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