[Seruzawa]

James Garner was depicted as a Canadian so he could get away with the American accent.

[lurked_for_a_decade]

I believe you are correct.

https://www.youtube.com/watch?v=0bgiqKbnuyM

There are several videos on youtube of survivors returning to search the site of the old camp.

Also this. Another composite character for Virgil Hilts.

https://www.youtube.com/watch?v=lvJD3HUDYj4

https://www.youtube.com/watch?v=d2Hf1rKkgus

https://www.youtube.com/watch?v=2-H4fJsP5eg