2011 Tōhoku earthquake and tsunami additional power, because TEP's power plants were also damaged in the earthquake. Kansai Electric Power Company (Kepco) cannot share electricity, because its system operates at 60 hertz, whereas TEPCO and TEP operate their systems at 50 hertz; this is due to early industrial and infrastructure development in the 1880s that left Japan without a unified national power grid. Two substations, one in Shizuoka Prefecture and one in Nagano Prefecture, were able to convert between frequencies and transfer electricity from Kansai to Kanto and Tōhoku, but their capacity to do so is limited to 1 GW. With the damage to so
1923 Great Kantō earthquake regional police and the Imperial Army used the pretext of civil unrest to liquidate political dissidents. Socialists such as (平澤計七), anarchists such as Sakae Ōsugi and Noe Itō, and the Chinese communal leader, (王希天), were abducted and killed by local police and Imperial Army, who claimed the radicals intended to use the crisis as an opportunity to overthrow the Japanese government. Director Chongkong Oh made two documentary films about the pogrom: "Hidden Scars: The Massacre of Koreans from the Arakawa River Bank to Shitamachi in Tokyo" (1983) and "The Disposed-of Koreans: The Great Kanto Earthquake and Camp Narashino" (1986). They