There are some battles of various nationalities in the world. I read or see about these world news in recent days. I feel sad when I know these facts.
Japan consists of a lot of small islands as you know and we sometimes say Japan is 島国 (Shimaguni). I think we can live happily without these conflicts.
However,culture or custom is subtly different by two areas, east and west, or 47 prefectures in Japan. Dialect, food culture or various customs as each districts etc.
There is a TV show that introduces differences of each prefectures. I like to see it.
I can know various difficulties and am surprised at them every time. It is like 47 nationalities live here though Japan is a small country. Especially there are a lot of different food cultures in Japan.
Your impression for Japan might be different by places you visit in Japan. This diversity is our feature.