Lake Mashu摩周湖alternative words: Lake Mashuko, Mashuko, Mashu-ko, Mashu ko, Mashu, Lake Mashuu, Mashuuko, Mashuu-ko keywords: hokkaido , lake , tourist resort related topics: Hokkaido Prefecture , Lake Kussharo related web sites: http://www.hikyaku.com/gallery/english/mashuko.htm , http://www.sip.or.jp/~b_jack/masyuko/taito.htm explanation: Lake Mashu, with 20km of circumference and 140m of depth is a comma-shaped caldera lake originated from a volcano activity of Mashu Caldera. It is classed with Lake Baikal in Siberia as one of the most transparent lakes of the world. Moreover it is well known that the lake keeps the constant water level in spite of the lack of in and out flows. It forms "Akan national park" with Lakes Kussharo and Akan located on the west. | |