>>49110542In the case of the Ainu, underwear was only used by hunters (both men and women), possibly due to being more in contact with foreigners (Japanese to the south and Russians to the north)
These being loincloths, bearskin breeches, and fundoshis, so from a historical point of view, it is feasible. Another useless fact, Japanese women with kimono did not wear underwear as it was considered unsightly.