I think Japanese people don't think much about the tribe compared with other foreigners.
One of the reasons is that Japan is an island country.
However, United Kingdom is also an island country, but there are many ideas of the tribe.
What did its difference make between two countries?
The history of each countries made the distinction outstanding, I suppose.
The national isolation in the Edo era is the most infulential event for unconcerning with the tribe.
People were tend to think that Japan is a homogeneous state.
Now, of course, we know that idea is wrong.
For example, Ainus, Ryukyu people and their offsprings live with us in Japan.
We should know other tribes more earnestly.
