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It is Mt. Fuji seen from Lake Motosu. 12.6km of circumferences and depth of water of Lake Motosu are the deepest in the Five Lakes of Mount Fuji which exist about 138m, and it is a lake of the 9th depth also in the whole country. Incidentally the deepest-water lake is no less than 423.8m in Tazawako in Akita Prefecture. The 2nd place is the depth of water of about 360m in Lake Shikotsu in Chitose, Hokkaido. both Sai-ko, and Lake Motosu and Shoji-ko are about orthometric height 900m of the water surface -- ancient times -- Lake Motosu and Sai-ko - Shoji-ko was connected -- although that is right It is said that it was divided by the eruption of Mt. Fuji, and inflow of lava, and became a present form. Since these three lakes hardly change a sea surface, they are said to connect the bottom of a lake still now. Moreover, Lake Motosu is likely to be located in a line with Sai-ko, and midwinter is not likely to freeze over. The temperature of the subsoil water which flows in from Mt. Fuji is comparatively stable, and temperature is comparatively high in a winter season, If deep-water, a convection is likely to take place and the temperature freezing over is not likely to get cold easily. It is sometimes north the same as this more, and it can say also in deep-water Tazawako and Lake Shikotsu. These two lakes are ice-free lakes too. |