FWIW I view Japan as still a player, just more specialized (although yes, TSMC is often still involved.)

Specifically, imaging sensors. Canon still makes their own sensors in Japan, and Sony makes all sorts of sensors that are used both by competitors in the camera space as well as Phones, (e.x. Apple after over a decade is only now starting to diversify with Samsung US Fabbed sensors,) Dashcams and Security Cams(Even a lot of the Chinese built ones, if you see STARVIS it's a Sony sensor)

That said, Imaging sensors do hit a curious level of 'needing bleeding edge but is not necessarily as complex as a cpu'. i.e. you're striving for precision and quality but the part itself is a lot more 'repetitive' across the silicon area compared to a CPU.