Groundbreaking 'April 2022' is given by TrendForce[1] and Kumamoto Nichinichi; the 24 February 2024 opening and December 2024 mass production are in several outlets. Only month precision exists for the start and the production start.
JASM Fab 1 in Kikuyo, Kumamoto is TSMC's first Japanese fab, a joint venture with Sony Semiconductor Solutions and DENSO. Ground was broken in April 2022, the building was reported complete in January 2024, and the plant opened on 24 February 2024. Mass production began in December 2024. A magnitude-7.1 earthquake on 28 July 2026 halted it briefly, and TSMC reported full production again on 3 August 2026.
$8.6B