The name Heian­n­o­mizu­u­mi Lake is not found offi­cial­ly in Japan­ese sources. It is most like­ly a dis­tort­ed or roman­ti­cized spelling of one of Japan’s famous lakes. Most often, it refers to one of the Five Fuji Lakes (such as Yamanakako or Moto­suko) or a poet­ic name asso­ci­at­ed with the Heian peri­od.. Area: 2,1300001 sq. km., vol­ume: 37,599998 cubic meters, depth avg: 17,6 m, shore length: 21,129999 m, res time: 374,79999, ele­va­tion: 272