Translation:There are Ainu people in Japan.
I dont know where to begin... One study says only 5％ of japanese have pure japanese dna They actually look very different if you look carefully . Their period of closed borders came late and while phenomenal was relatively brief in the grand scheme.
Ainu are sort of japanese russian mix with their own way of life they wouldnt give up and they lost their homeland of northern japan to mainstream japanese who needed it for strategic purposes
Anyway, just keep asking the good questions like that
The great question about the Ainu language, since it is traditionally only a spoken language, is whether to use cyrillic or katakana to adapt its written form. Cyrillic is phonetically a better fit, but most people know only the Hokkaido Ainu, who are probably the more active group at least online, so maybe katakana should be preferred? Hmm...
"There are Ainu in Japan" was accepted for me.
If you see the word カナダ人 (kanadajin), most people would most naturally translate it as "Canadian" rather than "Canadian person", whereas if you have 日本人 (nihonjin) we'd say "Japanese person" because Japanese is used more as an adjective than a noun. Since Ainu is a noun, I think the former is preferable to the latter, though you could say either.
I knew I was going to get this one wrong, but I didn't think I'd be off by just one letter. I said "Ainu peoples", but I guess that's wrong if they're all considered to be of a single ethnicity/cultural background. Can anyone speak to that? Are the Ainu one people or do they comprise multiple peoples?
I think the Ainu are usually considered a single people, but you can find references online referring to "Ainu peoples", like from the Ainu Association of Hokkaido:
"Wajin" (Japanese) in Honshu acknowledge great difference among regional groups of the Ainu. In other words, the Ekotoba indicates that three groups of Ainu peoples, "Hinomoto," "Karako" and "Watarito," live on the island of Ezo-ga-Chishima(present day Hokkaido) and describes the details of each group.
The Wikipedia article describes the different subgroups of Ainu based on their location, such as Hokkaido Ainu, Sakhalin Ainu, Northern and Southern Kuril Ainu, etc.
I know nothing about anthropology, so I don't know if these distinctions count as separate "peoples" or not.
[place] に [something] が います。
Something exists in a place. / There is something in a place.
Ainu people exist in Japan. / There are Ainu in Japan.
You can use the は particle to make 日本 the topic of the sentence.
About Japan, Ainu people exist there. / There are Ainu in Japan.
You can also just say アイヌ instead of specifying アイヌの人たち, but you need to use the correct particles. You could say 日本中 (nihonjuu) to mean "throughout Japan", but there's nothing in the English to indicate "throughout", and Ainu are mostly only located in northern Japan, not throughout Japan.