Talk:General Discussion/@comment-180.246.53.220-20151101082551/@comment-26447355-20151102051548

https://en.wikipedia.org/wiki/Thonburi-class_coastal_defence_ship

These would be my best guess for the Coastal Defence Ships, since they're the only ones build after 1920, plus they were build by Kawasaki for the Royal Thai Navy, one of Japan's allies.