Like there is some history of what can be called colonization in Finland and Japan, with the Ainu in Japan and Sami people in Finland. But like these places resemble ethnostates based more off of geographic and language isolation.
If Japan spoke English as a second language the same way you see in former British colony states, you can bet your ass that island would be full of immigrants and non-japanese people.
But it's an island with a language that is really hard for Westerners to learn.
Finland is a snowy wasteland most the year, so yeah not a lot of people want to live there, so only the people who have always lived there live there. Finnish is also a hard language for not Scandinavians to learn.
The other countries are just absolutely pulled out his ass, I think, but again are probably more ethnostate like due to geographic issues and not because some people started colonizing it in the last century and kicked out the modern native population that was living there forever