Kono (common name is Konuma) is a volcanic lake at Mt. Jizoudake whic is one of Mt. Akagi. It locates 1450m altitude, higher place than Ono lake and Kakumanbuchi. There is a legend of the tragedy that a 16-year-old young lady of a powerful family Akahori in the Akahori village was drawn into Kono and became the dragon goddess when she went to Mt. Akagi for paying homage at a shrine. When heart-rending her father Dogen threw the box of red rice into Ono lake for her memorial service, only empty box was returned next day. After that young girls wanted to go to Mt. Akagi, they threw the mirrors in place of them.