I don't think nerd and otaku culture has been embraced in Japan as much as it has in the West in recent years. Like 10/20 years ago it wasn't a very cool thing for someone in the West to be reading comics into their adulthood but now it's a lot more accepted.
Of course, I'm not from there so I don't have first hand experience of this.
Well... as an asian person. I tend to stay away from people who are focused on asians. I don't wanna spend time with someone who only approached me because I'm asian. I'm pretty sure a lot of american born asian people (especially females) get serious red flags when they hear about people because a lot of us have had experiences with people with "yellow fever".
TLDR; Don't focus on meeting just asian people. Meet and hang out with people of all colours.
It's not exactly like that, actually. There's many asian people that read manga, but they usually just read it in their own language. For instance, Japanese read manga with japan language, Chinese read manga with china language and so on. I live in Asia and I have lots of friend who reads manga. Even in my city, there's so many manga/anime lover community.
It's not like i'm interested in them just because they are asians.. i actually ''don't'' like americanized asians. Well i like japanese(and korean) people because of the way they are raised, their culture, personality. it's hard to explain.. it's not about looks(but it's true i love their eyes) i have special affection to them.
Waa why can't i meet japanese people who read manga? like they doesn't exist XD. and when i talk with asian people they look me like weirdo who reads manga at this age(23 years old)