A magnitude 7.1 earthquake in Kumamoto triggered evacuations and inspections at TSMC's Japan chip hub, while supplier Topco Scientific said its Kyushu inventory and logistics were intact.
TSMC evacuated its Japan Advanced Semiconductor Manufacturing (JASM) site in Kumamoto Prefecture after a magnitude 7.1 earthquake struck Japan's Kyushu region on Tuesday, triggering emergency headcounts and inspections at its key Japan production base. No comprehensive reports of casualties or major structural damage had emerged at the time, and investors were watching for any impact on utilities, equipment calibration, in-process wafers and output recovery. At the same time, semiconductor materials distributor Topco Scientific said the quake had not disrupted supply in Kyushu. The company and its Japanese subsidiary Shungawa Shoji said an inventory check completed on the evening of the 28th found no damage at Topco's Tosu warehouse, where CEO Chen De-yi said seismic intensity was about 3 and furnace quartz, reclaim wafers and specialty chemicals remained intact. He said emergency shipments and replenishment could be activated at any time. TSMC's ADR fell as much as 2.64% in U.S. pre-market trading to about $388.55, reflecting uncertainty over possible operational disruption rather than confirmed damage. The combined updates suggested immediate caution at the fab level but no reported interruption in a nearby semiconductor materials supply chain.