The Class EF510 (EF510形) is a Bo-Bo-Bo wheel arrangement multi-voltage AC/DC electric locomotive type operated by JR Freight and East Japan Railway Company (JR East) in Japan since 2002.

[1] As of 1 April 2016[update], the fleet consists of 40 locomotives (24 EF510-0s and 16 EF510-500s), all based at Toyama Depot.

[3] The EF510-500 subclass consists of 15 locomotives originally operated by East Japan Railway Company (JR East), which replaced its fleet of EF81 locomotives formerly used to haul Cassiopeia and Hokutosei overnight sleeping car trains from June 2010.

[7] Two of the fifteen locomotives (EF510-509 and EF510-510) were painted in a dedicated colour scheme of silver with blue, purple, red, orange, and yellow stripes, to match the Cassiopeia rolling stock.

[13][14] The EF510-300 subclass is operated by JR Freight in the Kyushu area of Japan, of which 17 locomotives are to be built.