Did he say he should learn English or did he say him knowing English is better for marketing the Japanese player to the American market?
if so, I agree with him. Also if you integrate into a society and you don’t learn the language you are retarded. It will make life and the overall experience easier and more fulfilling.
It would benefit the player to learn English to better communicate with teammates, coaches, staff etc.
There’s a difference between this and an ignorant mf saying leave your culture and traditions back in your home country.. it has no place here in Americaaaa!