Around 1994, some bathhouses in the city, prompted by the bad behavior of some visiting sailors, decided to bar all foreigners from their premises. The owners justified their actions by citing foreign ignorance of Japanese bathing custom, complaints by Japanese customers, and poor foreign sanitary habits.
Unwilling to accept the bathhouse's policy, a group of foreign residents appealed to local, regional, and national authorities for clarification on their rights.
What they discovered was that Japan actually has no law in place outlawing discrimination on the grounds of race or appearance.

Oh, the joys of homogeneity.. I think Japan confuses 'wa' with 'law' most of the time.
GJ