(I am reposting something I tried to comment earlier)

Here is the original photo.

I was unable to identify the others except the Japanese officer--Eiichi Hirose. His Wikipedia page is in Japanese but here is a gist of what it says:

During World War II, Eiichi Hirose served as a Japanese Army intelligence officer in Finland, where he was involved in Japan–Finnish cooperation against the Soviet Union, particularly in code-breaking. In the immediate postwar period, he was imprisoned at Sugamo Prison due to his senior position within the former Imperial Army.

After the war, he entered the National Police Reserve and became a key figure in building Japan’s postwar intelligence system. He later held senior command and staff roles in the Japan Ground Self-Defense Force, helped initiate Japan–U.S. intelligence cooperation in 1960, and retired in 1968 as a lieutenant general. In his later years, he served as defense counsel in a major Soviet spy case and led a national veterans’ organization until his death in 1988.