Five Lakes of Mount Fuji
The five lakes are located in an arc around the northern half of Mount Fuji. In ancient times, lava flow from a volcanic eruption of Mount Fuji spread across the area, damming up rivers and resulting in the formation of these lakes. They are excellent tourist attractions and fishing spots.
Lake Kawaguchi (河口湖 or 'Kawaguchi-ko') is the most famous of the five lakes, and images of this lake are usually used in posters and commercials. A large number of hotels line its banks, as do locals providing boat rides to the tourists. It is the only lake among the five lakes that has an island.
Lake Motosu (本栖湖 or 'Motosu-ko') is the ninth deepest lake of Japan, at 140 meters. This lake, along with Lake Sai and Lake Shoji, was formed by lava flowing across what is now Aokigahara Jukai Forest and into the enormous lake that once dominated the area, and these three lakes remain still connected by underground waterways.
Note: The swim is ranked among the Top 50 Open Water Swims In Asia.