Today I watched a Japanese show which interviewed a Japanese old migrant in Kalmykia. I didn't remember the place name. But when I saw the Mongolian faces of the local people, and that the place was a exception among soviet republics that had Buddhist religion, I suddenly remembered that a Russian poster on /kc/ told me about the place.

20130510 Sekai no Mura de Hakken! Konnatokoro ni Nihonjin (Miyazawa Sae) part03
https://www.dailymotion.com/video/xzwdlh

This show would send Japanese actors or actress to remote places to interview Japanese emigrants there. The show showed many different emigrants. Some are younger foreign aides volunteers. Some are migrants who find jobs there. Some, very old ones, are war prisoners or orphans taken by the host countries in WWII.