J8MM 1936 Pyenyang, Korea

Before WWII the whole area was "Korea," but after the War it became two new political countries that hadn't existed before, North Korea and South Korea.
J8MM became J8CD and was in the same area as today's North Korea, but there's no real category for him.
Actually, the same is true for pre-war stations in the current South Korea area, so I suppose they should be treated similarly.

Dated May 8, 1936

QSL EA5BM Collection
Info courtesy of W6YA
1st two Photos Patrick Rigg Collection
Last Photo courtesy of Norbert Maibaum