From what I heard about Japanese police and institutions, it ain't racial they don't trust ALL foreigners. Just ask every foreigners living there how easy it is to rent or how they freeze accounts very close to when VISAS runout even if they are getting renewed. They have these measures as they expect every foreigner to ditch when they can and after event's like Fukushima, you can't blame that logic.

And also it isn't made any better by experience too. I remember my UK buddies telling me before migrants to Europe, they were mostly complaining about white Eastern Europeans coming over and taking a lot of the trade jobs at a lower rate devaluing the market.

Now compare that to the main complaints after when it became majority African and Middle Eastern men and there seems to be a big fucking difference in the civility of cultures that you may want a few extra cops tailing them.