TSMC's Second Japan Fab Was Upgraded to 3nm for the AI Boom — Then an Earthquake Paused Construction
Taiwan's government approved TSMC's plan to deploy advanced 3-nanometer production at its second Kumamoto, Japan fab, upgraded from an original 6-to-12nm plan on soaring AI-chip demand. Construction was then briefly suspended in early August 2026 as a precaution against earthquake aftershocks before resuming.
- Taiwan's government approved TSMC's plan to deploy 3-nanometer production technology at its second fab under construction in Kumamoto, Japan.
- The facility was originally planned to manufacture 6-to-12nm chips; the shift to 3nm is a direct response to soaring global demand for AI-related chips.
- The upgraded fab is scheduled to begin installing equipment and come online in 2028, with planned monthly capacity of 15,000 12-inch wafers.
Taiwan's government approved TSMC's plan to deploy advanced 3-nanometer production technology at its second fab under construction in Kumamoto, Japan. The facility was originally planned to manufacture older 6-to-12nm chips; upgrading it to TSMC's advanced 3nm node is a direct response to soaring global demand for AI-related chips, which has outpaced what TSMC's existing advanced-node capacity in Taiwan and the US can absorb.
The upgraded fab is scheduled to begin installing equipment and come online in 2028, with planned monthly capacity of 15,000 12-inch wafers. Committing an entire second Japan facility to the most advanced process node TSMC currently ships in volume signals the company sees AI-chip demand as durable enough to justify re-purposing already-underway construction.
The timing carries a real near-term complication: in early August 2026, construction was briefly suspended as a precaution against aftershocks following regional earthquake activity, then resumed after additional safety inspections. TSMC has not issued a revised timeline despite the suspension, meaning the 2028 target officially stands. For a facility being upgraded specifically to meet urgent AI-chip demand, any construction disruption is worth tracking closely — a fab built to relieve a capacity crunch that then falls behind schedule doesn't relieve anything on the original timeline.
Sources
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Taiwan government approves TSMC's 3nm upgrade for second Japan fab
— Taipei Times
Government approval and original vs. upgraded node plan
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TSMC plans to start 3-nm chip mass production at Japan fab in 2028
— S&P Global AutoTechInsight
2028 timeline and 15,000 wafer/month capacity
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TSMC Kumamoto Fab Profitable for First Time; Earthquake Clouds 3nm Expansion
— Tech Times
Recent earthquake-related construction suspension and resumption
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