Yamasaki Cirque is a cirque located on the North-West side of Oyama peak of Mount Tateyama, Hida Mountains, Japan. Outlines It is 400 metres wide, and its length is 600 m. It is one of the first cirques discovered in Japan by geographer Naomasa Yamasaki (1870–1929), in 1905. It was named after Yamasaki in 1942. In 1945, it was assigned as natural monument by national government as "Yamasaki Cirque of Tateyama". Geologist Saburo Fukai found three moraines in the cirque.Kitanippon Shimbun (newspaper) It is prohibited to go inside the cirque, but it can observed from Enmadai Platform in the north of Mikurigaike Pond."Shin Nihon Sangakushi" November 2005, edited by Japan Mountaineering Association, published by Nakanishiya
See also Naomasa Yamasaki Mount Tate Cirque Karasawa Cirque Senjōjiki Cirque
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