Japan has never experienced the kind of large-scale immigration or even until the postwar US occupation from 1945 to 1952 foreign invasion that has made for social conflict in other countries.
Japan has a very low rate of immigration, which has prevented large scale social conflict.
In this photo there is are two men one in a blue shirt blue pants white hat and sunglasses the other has on pants that are rolled up just under his knees and a black shirt on they are both on a boat at sea it looks like the man with the black shirt is looking for something while the man in the hat is handling a white rope in his hands.