In the tropical botanical garden of Hakodate, Yunokawa Onsen, take a look at the refreshing 100 monkeys who enjoy the hot springs in the cold season. Every year from December 1st to early May, people inject hot springs into the pool. The monkeys jump into the pool to warm up. The monkeys look like ordinary people and they are unusually novel. It is a famous scene in Hakodate. Just getting off the bus will feel the cold and cold sea breeze blowing from the Tsugaru Strait. Watching the monkeys soak in the hot springs, while swaying in the hair or swimming in the hot spring pool, it is quite interesting to play and play. The water temperature at the source of the hot spring is about 60 degrees. By adding water to the hot spring pool, the temperature of the hot spring is kept at about 40 degrees that the monkey likes.