It is more complicated than that.

The Chinese government in the last decade made the life of foreign automotive brand un-manageable. Most of them (outside of the luxury market) are now getting out.

They enforces rules that are clearly designed for IP leaks and takeover. For instance: For every vehicule sold in China by Toyota and others, the source of the software need to be sent to the Chinese authorities.

This is not a market that the Japanese want to stay in: They know they are playing against someone that cheats with the rules.