The 415 series was introduced in 1971, and has since spawned six variants, 415-0 series to the 415-1500 Series. The 415-100 Series was introduced in 1978, and most of the trains are operated by JR Kyushu, although a few trainsets were operated by JR East on the Jōban Line (the latter were withdrawn in March 2007, in favour of the E531 series trains).
