>>48911271They mainly don't allow Russians entry to the bathhouses/hot springs and the soap districts are strictly off limits to foreigners.
Russians normally do not prewash themselves before entering the bathhouse, which is why they're banned. Japs got sick of telling them to shower BEFORE entering the bathhouse/hot springs. Yes, I said before. No one likes to bathe if the scummy film of others.
And the soap district, well that industry is more of a grey market business. The last thing they want is to water out any international incidents. Or deal with some dipshit getting rough with one of the girls.
General rule of thumb; idiots ruin everything.