I've known of it but had forgotten the details. The Panay incident of 1937 is also little known.
Hawaii was dealt with by making it a military zone.
Exclusion involved, IIRC, five miles in from the West Coast and affected more than people of Japanese descent. Part of the Gulf Coast was treated similarly.
I think that relocation forced people in 100 miles. Some 5,000 Japanese-Americans are said to have successfully relocated on their own, some 120,000 placed into Relocation Camps. A small number of Italian-Americans were also affected but for just months. Relocation involved U.S. citizens.
What I would call 'internment' would be the alien detention camps that are common to all wars.
Our Commonwealth allies also had such camps but not much is made of that in this country.