7.1-Magnitude Quake in Kumamoto, Japan, Halts Auto Production, Disrupts Supply Chain

A magnitude 7.1 earthquake recently struck Kumamoto Prefecture in Japan, severely disrupting the automotive supply chain across the Kyushu region. Multiple automakers—including Toyota, Nissan, Mitsubishi, Daihatsu, and Honda—have successively announced production cuts or temporary shutdowns, with total output reductions expected to exceed 10,000 vehicles. Toyota has extended the suspension of operations at its three Kyushu plants until August 5. These include the Miyata Assembly Plant (annual capacity of 430,000 units, primarily producing Lexus ES, UX, RX, and NX models—approximately 90% of which are exported), the Kanda Engine Plant, and the Kokura Hybrid Transaxle Plant. Additionally, Toyota’s Tahara Plant in Aichi Prefecture will halt production for one week from August 3 to 7. This facility manufactures the Lexus GX, LS, IS, as well as the Land Cruiser 250 and 4Runner. Nissan’s two Kyushu assembly plants have also suspended operations until August 5, halting production of models including the Infiniti QX80, Nissan Patrol, Armada, Kicks e-Power, X-Trail (exported as Rogue), and the fourth-generation Elgrand e-Power. Mitsubishi partially halted production at its Mizushima plant starting July 30, while Daihatsu suspended operations at two of its factories. Honda temporarily shut down a motorcycle plant located in Kumamoto. On the supply chain front, Aisin, a core Toyota supplier, temporarily ceased operations at its Kyushu subsidiary, which produces door locks, sunroofs, and aluminum die-cast engine components. Renesas Electronics’ wafer fabrication plant in Kawashiri is expected to resume production on August 5 and aims to restore full pre-earthquake capacity within three weeks. Astemo, a subsidiary of Hitachi Group, remains shut down as it assesses damage at its local facility. This earthquake has once again exposed the vulnerability of Japan’s automotive industry under the just-in-time production model—even when vehicle assembly plants suffer no direct damage, disruptions at key component suppliers can rapidly cascade through to final vehicle assembly lines.