Sony has announced plans to restart its image sensor factory in Kyushu, Japan, in phases starting Tuesday, following a 7.1-magnitude earthquake and multiple aftershocks that struck islands in the southwestern part of the country. The company expects production at the facility to return to pre-earthquake levels by mid-August. The factory, located in Kumamoto Prefecture, manufactures image sensors used in digital cameras, surveillance systems, and advanced driver-assistance systems for automobiles, but it does not produce sensors for smartphones.

Kumamoto Prefecture is also home to manufacturing facilities for companies such as Taiwan Semiconductor Manufacturing Co (TSM.US), Tokyo Electron, and Mitsubishi Electric. Many of these factories remain largely shut down as equipment undergoes inspections and calibration, and the full impact on the industrial and technology supply chain is not yet clear. A decade ago, the same region was hit by a devastating earthquake, and it took Sony over three months to resume operations at its plant and another two months to restore normal output levels. In contrast, Sony also operates image sensor factories elsewhere in Kyushu, which were not affected by this earthquake.

The impact of this earthquake is relatively limited compared to 2016, when Sony's Kumamoto factory was idle for more than three months and took five months to fully recover, resulting in tens of billions of yen in direct and indirect losses. This time, the shutdown lasted only about a week (from July 28 to a phased restart on August 4), significantly reducing the risk of supply chain disruptions. The Kumamoto plant mainly produces image sensors for digital cameras, security monitoring systems, and automotive ADAS, not smartphone sensors. Sony's primary mobile phone sensor production bases are located in other parts of Kyushu, such as Nagasaki, Oita, and Kagoshima, and the company has confirmed that these facilities suffered no substantial damage from the earthquake, with normal production unaffected. As a result, the smartphone supply chain for core customers like Apple (iPhone) has not been directly impacted.

Market analysts note that after the 2016 Kumamoto earthquake, Sony and other local semiconductor manufacturers, including TSMC's Kumamoto plant, conducted comprehensive upgrades to factory seismic resistance, equipment reinforcement, and earthquake response procedures. The ability to complete inspections and announce a phased restart within a week demonstrates high supply chain resilience, reducing the risk of long-term earnings volatility. Capital markets have shown a muted response to short-term stock price fluctuations in Sony. Analysts believe that short-term delivery delays for automotive and camera sensor components can be offset by subsequent production ramp-ups and inventory adjustments, and they are unlikely to cause material harm to Sony's full-year revenue and earnings guidance.