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On February 24, Japan's Nikkan Kogyo Shimbun reported today that TSMC plans to build a second chip manufacturing plant in Kikuyo, Kumamoto Prefecture, Japan, with an investment expected to exceed 1 trillion yen.

TSMC's first plant in Kumamoto is now under construction, with production targeted for 2024. The plant is being operated by Japan Advanced Semiconductor Manufacturing (JASM), a Kumamoto-based foundry services subsidiary, with investments from Sony's Semiconductor Solutions and Toyota Motor Group Enterprises and Denso.

The new plant is said to be the same size or larger than the first one, and will likely introduce advanced processes in the 5-10nm range (the Kumamoto plant, scheduled to start up in late 2024, is planned to produce 22/28nm and 12/16nm chips with a monthly capacity of 55,000 wafers), and is expected to start operations after 2025. The company has highlighted the ability to share human resources and equipment between the two plants, and plans to decide on the details during 2023.

Reports indicate that TSMC appears to be negotiating on issues such as government subsidies and customer investment, and will finalise details by the end of the year. The Japanese government has made securing a stable supply of semiconductors an important economic security issue.

Last year, TSMC, along with Sony Group and others, invested around US$7 billion to build a semiconductor plant in Kumamoto Prefecture, and Japan decided to provide 476 billion yen in subsidies for the plant.

In addition, TSMC's CEO also said at its financial results meeting in January that the company was considering building a second factory in Japan. However, Sony has said it has not discussed with TSMC on related matters.

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