I think you’d find less confusion if you said “I am Japanese”. It’s not clear to me that “a Japanese” is wrong, it’s just not something I’ve heard before in ter

I think you’d find less confusion if you said “I am Japanese”. It’s not clear to me that “a Japanese” is wrong, it’s just not something I’ve heard before in terms of English phrasing. Similarly, I would likely say “I am Korean” rather than “I am a Korean”.