The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Only a year is given: Taiwan's MOEA says the fab is "scheduled to start installing equipment and come online in 2028", and C.C. Wei said on the 16 April 2026 call that "commercial production is scheduled to begin in 2028" - so the year's last day, estimated.
CNA on TSMC's[6] first-quarter investor conference: C.C. Wei said the second Kumamoto fab will adopt the 3nm process and commercial production is scheduled to begin in 2028, and that Taiwan's government has approved the new plan.
Economic Daily News reports the MOEA investment commission's 31 March approval of the changed JASM plan: 3nm, a 15,000-wafer-a-month 12-inch line, with equipment installation and volume production from 2028.[1]
Kumamoto broadcaster KAB's report (with video) of C.C. Wei telling Prime Minister Sanae Takaichi on 5 February 2026 that the second fab under construction in Kikuyo will make 3nm chips, Japan's first, and Takaichi's welcome.
BusinessNext recaps the schedule (start delayed from Q1 2025 over traffic, formal start in October 2025, reported slip and pause in 2025) and cites Yomiuri that the fab's investment rises from US$12.2 billion to US$17 billion with 3nm, on top of Japan's subsidy of up to 732 billion yen.[1]
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