> Japan is largely homogenous While that's true I always like to remind people of the Ainu people (https://en.wikipedia.org/wiki/Ainu_people). They are an example of a suppressed (largely extinct) ethnic group in Japan. Basically Japan's native Americans.

Aside from that, drug prohibition has always been used to h arras people on a basis of their class background. The working and caring classes always take the main toll in prohibition.