What are the natural barriers that isolate Japan from the world?

Mountains and volcanoes hope I helped :))

The mountainous islands of the Japanese Archipelago form a crescent off the eastern coast of Asia. They are separated from the mainland by the Sea of Japan, which historically served as a protective barrier.

Explanation:

can u pls answer my questions too? Thank you and have a nice day :)

Domestic essentially means in your home, or something to do with your home. (Domestic violence).

So, domestic terrorism would be that it is practiced against a group’s own country by some to bring attention to specific problems in society. 

Our country is our home. So, there you go.

I hope I helped. Best of luck!