I'm mixed, asian british. my mum is from south korea, and has said that she "doesn't believe i have depression." not long ago she was saying that she "didn't believe in mental health" until i had to take sertraline for a while. even so, she wasn't a particularly strict parent, at least in asian parent standards lol. but i think this is a mix of cultural and generational difference. i say there's a generational difference, because my dad who's fully british said very similar things.
all that being said, I grew up in the UK. i think it's the culture + society in korean / japan that causes suicide in people, rather than genetics. more specifically, one's own upbringing and quality of life is what causes it. i even think that certain personalities could be more naturally drawn to suicide than others, though this is just a personal theory.
at least i know for sure, whatever race / ethnicity i was, or wherever i grew up, id still be suicidal.
sorry if this wasnt super coherent i was rambling quite a bit lmao. i hope i still kinda got my point across tho