As I mentioned earlier I think Shimosueyoshi is the closest equivalent to Eem in Japan (at least for geomorphologists). And M1 is also commonly used by Ota and other authors for Shimosueyoshi terraces (including earlier work like Yoshikawa et al on Muroto).

As I mentioned to Luca earlier I think Shimosueyoshi is closest to Eemian equivalent in Japan, at least for geomorphologists. And yes, M1 is also commonly used for Shimosuesoshi terraces, not only by Ota but from earlier studies like Yoshikawa et al 1964 on Muroto.

I have just checked ‘inventory of quaternary outcrops’ by Japan association of quaternary research. It says that in the topo map of 1982 the outcrop already disappeared…

ちょっと違う😂