Sources: Sony and TSMC plan a $6.3B JV, owned ~60% by Sony and ~40% by TSMC, to mass produce next-gen image sensor chips in Japan's Kumamoto as early as 2029 (Nikkei Asia)

https://asia.nikkei.com/business/tech/semiconductors/sony-tsmc-to-invest-6.3bn-in-advanced-image-sensor-plant-in-kumamoto
http://www.techmeme.com/260809/p15#a260809p15