Tame sushi with the char of ingredients the inside in a mountain. It develops as a New Year’s dish and an event food. I take internal organs of char (Other river fish are also fine.), stuff salt soup stock and vinegared rice in 1 month before which is pickled and eaten with many salt, put a stack arrangement weight in the barrel and ferment. It’s handed down from generation to generation only at about 10 percent of home present.