I appreciated the thoughtful and sensitive treatment of a subject that is often reduced to political postures. When I lived in Japan throughout the 1980s until the mid-1990s, my mixed race children (white American-Japanese) were not discriminated against in Tokyo.
I found that the clearest form of discrimination was in housing in Tokyo. About half of the landlords would not rent to a white foreigner. I heard that for black foreigners the rate was higher.
I watched a documentary Struggle and Success: The African-American Experience in Japan by Regge Life in the early 1990s that was very informative and many-sided about the subject. It was one of the best documentaries about Japan that I have seen.