Sanya Hainan Island
"Sanya Special Duty Department" is stamped on the reverse side of the photos. These are thought to be photos of the 16th Guard Unit.
A Petty Officer, June 1942
December 11th, 1942
Petty Officer 2nd Class Kato (加藤)
December 12th, 1942
Petty Officers and Sailors with military workers