The Class EF10 (EF10形) is an electric locomotive built for the Japanese Government Railways formerly operated on freight services in Japan from 1934 until 1983.

41 locomotives were built between 1934 and 1941 by the manufacturers Hitachi, Kawasaki Heavy Industries, Kisha Seizo, Mitsubishi, and Toshiba.

[1] Locomotives EF10 20 to 24 continued with the same body design, but with a different ventilator arrangement.

[1] Locomotives EF10 30 to 33 continued with the same welded angular body design, but used cast bogie frames.

[1] Locomotives EF10 34 to 41 used the original bar frame bogie design.