> IMHO it's not racism, it's culturalism.

On the contrary, it's an institutionalized xenophobia/Racism deeply embedded in the national Japanese psyche. take for example these (recent) cases of blatand racism.

[1] http://www.debito.org/?p=15013

[2] http://www.debito.org/?p=14950

[3] http://www.debito.org/?p=14981

[4] http://www.debito.org/?p=14954

[5] http://www.debito.org/?p=14989

also this

"Japan racism survey reveals one in three foreigners experience discrimination"

https://www.theguardian.com/world/2017/mar/31/japan-racism-s...