The Sakuragichō train fire occurred on April 24, 1951, when a 63 series Keihin Line train approaching Sakuragichō Station in Yokohama hit a loose overhead wire causing a short circuit and starting a fire which killed 106 people and injured 92.

The 63 series (63系) was a commuter electric multiple unit operated by Japanese Government Railways (JGR) and Japanese National Railways (JNR). The cars that made up the 63 series were numbered as MoHa 63, SaHa 78 and KuHa 79.