The Hells of Beppu in Beppu, a city on the island of Kyushu, are a series of hot springs that are too hot for bathing, but are a unique and interesting sight to see.
The Japanese river otter, once common throughout Japan, is now extinct due to habitat destruction and hunting.
Japan has a game show called "Human Tetris" where contestants have to contort their bodies to fit through holes in a moving wall.