Enough to make you want'a cry!

A friend sent me a link to a number of reportedly newly released photos from just after the end of WWII and this was one of them. Don’t know much about Japanese ammunition but this one seems to be pretty large for SA. 12mm? The caption simply said they were discarding munitions at sea.

Could be the 13.2 Hotchkiss which was widely used by the JAPanese. More photos ?