Social Justice Warriors ride high in East Asia. You will be surprised to see many Japanese have "White-guilt" even though they are not White. It is the most comical when they are virulently anti-Korean(or sometimes Chinese) and yet shout BLM.
Sakura Chinami did quite a few IR but has said racist things against "immigrants"; she probably does not count her Black partners among them;as "immigrants" is a code word for ethnic Koreans.
On the other hand many Japanese porn actresses want to be popular with Korean men perhaps due to the K-Pop craze in the past several years.
For reasons I will not explain here they tend to avoid IR to keep their popularity abroad.
Hatano Yui, Hamasaki Mao used to visit Korea quite frequently for fan-meetings before this Wuhan-Covid spread.
Mikami Yua was trying to start her career as a K-Pop singer in Korea.
Hamasaki Mao was a minor figure in a big budget Korean movie a few years ago. It flopped but was not such a bad movie. Korean feminists were furious about a legit big budget movie featuring a JAV star.
...You dont want to have sex with a black person yet still try to fake it instead of flat out refusing. ...
It is called "tease". Many White porn starlets did it, sometimes cruelly, like Alexis Taxas. There used be a group called "interracial dodgers". They never flat-out refused to work with Black actors but always came up with all kinds of phony reasons like Black dicks are too big, or they have a trauma - r***ing by a Black man - or they are not attracted to Black men or their boyfriends do not allow them or they will do it later in their career etc. etc.
Fake black dick series actually started in the US and many who would not do real Black dicks were in the series, like Hollie Stevens. There were some who would suck Black dicks but not fuck them. There were also those who did Black men in private lives but not on screen. There were also those who would do IR only on-screen but not in private lives.