Removal work being carried out on July 4 on roads made impassable from mud and debris left by a landslide in Atami, Shizuoka Prefecture (Yusuke Fukudome) A huge typhoon in 1958 caused the Kanogawa river, which runs through the Izu Peninsula, to flood and burst its banks. The water's force triggered flash floods and mudflows, killing many local residents. A doctor at a medical facility in the Tsukigase district in the river's upper reaches who was well versed in meteorological phenomena led some 30 patients and staff members at the facility in an early evacuation, saving their lives. The episode has been handed down for decades as the “lesson of Tsukigase.”