Sony and TSMC to Establish Joint Venture in Kumamoto, Invest ¥747 Billion for Sensor Mass Production in 2029

Sony Semiconductor Solutions and Taiwan-based TSMC announced on August 11, 2026, that they had signed a definitive agreement to establish Advanced Vision Semiconductor Manufacturing, a joint venture in Koshi, Kumamoto Prefecture, to develop and manufacture next-generation image sensors. The companies plan to invest a total of about ¥747 billion in stages and begin mass production of image sensors for smartphones in 2029. Sony will contribute about ¥465 billion, or about 62% of the total, while TSMC will contribute about ¥282 billion, or about 38%.

The Sony-TSMC joint venture signals efforts to advance manufacturing and strengthen supply capacity in the image sensor sector. The model, in which Sony retains control while drawing on TSMC’s advanced process technology, offers one example of how semiconductor industry partnerships may take shape. The funding plan, which assumes support from the Japanese government, also underscores the importance of public-private collaboration in semiconductor strategy.

The definitive agreement puts into practice the strategic partnership Sony and TSMC announced in May 2026, so it represents a limited amount of new information. The investment scale and its breakdown are notable. Of the total of about ¥747 billion, Sony will contribute about ¥465 billion, or about 62%, more than TSMC’s contribution of about ¥282 billion, or about 38%. Sony’s position as the sole controlling shareholder and the venture’s status as a consolidated subsidiary also make clear that Sony will lead the operation. The structure gives Sony, the world’s leading image sensor maker, access to TSMC as a manufacturing partner with advanced process technology while retaining management control. We previously reported that Tesla named TSMC a key partner for Optimus. TSMC is also growing in importance as a supplier of semiconductors for robotics. The joint venture is primarily aimed at smartphone sensors, but the May announcement also outlined plans to pursue opportunities in “physical AI” fields such as automotive and robotics. The venture could therefore be seen as a step toward expanding TSMC’s manufacturing capabilities into the sensor sector. For the industry, Sony has traditionally relied on its own factories as a strength in the image sensor supply chain. By using TSMC’s advanced processes, it aims to mass-produce more sophisticated sensors. This shows that advances in manufacturing technology are becoming key to competitiveness as sensor performance improves. The funding plan’s reliance on support from the Japanese government also points to continued public involvement in the semiconductor industry. Some details remain unclear. The announcement did not specify production capacity, such as the number of wafers produced per month, or whether the venture will develop and manufacture sensors for automotive and robotics applications. The amount and terms of Japanese government support have also not been disclosed. The agreement marks a substantive first step in the Sony-TSMC partnership, but its success will depend on demand trends in the sensor market and the progress of technology development before mass production begins in 2029.

The joint venture will be based in Koshi, Kumamoto Prefecture, and support from the Japanese government is also under consideration. The Sony-TSMC partnership could strengthen Japan’s semiconductor manufacturing base. Image sensors are a field in which Sony has a competitive strength, and maintaining and expanding domestic mass-production capacity is expected to help preserve the competitiveness of Japan’s semiconductor industry.