The number of 1.5 and second-generation immigrants in Japan increased in the past few decades. Due to the lack of consistent policy to support the Japanese language education for immigrant children in Japan, many multi-racial Japanese children are academically struggling.

A great Japan Times article on grassroots effort to support multiracial children in Japan.

https://www.japantimes.co.jp/community/2022/03/28/issues/multicultural-center-tokyo-helps-non-japanese-kids-tackle-the-obstacles-of-getting-into-a-japanese-high-school/