The Main Line (本線, Honsen) is a streetcar line of Hiroshima Electric Railway (Hiroden) in Hiroshima, Japan. The line has been operated since 1912.^[1]

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The total distance of the line is 5.5 kilometres (3.4 mi). Routes 1, 2, 3, 5, 6, 7 and 8 operate on the line. The line has 20 stations, numbered M1 through M19 (two stations at Kamiyachō are both numbered M9).