Mysteirous lake brimmed with pure water. 2,115 high, the lake situated in the highest place in Japan, with the forest of moss spead aruond it. In fall, the best view for leaves changing colors reflected on the lake, with all the trees around it getting deep-red. With guiding placards. The roads around the lake is slippery; come with attires suited for trekking such as sneaker, trekking shoes or other comfortable shoes.