The Class EF500 (EF500形) was a prototype Bo-Bo-Bo wheel arrangement multi-voltage AC/DC electric locomotive formerly operated by JR Freight in Japan. Intended as a prototype for a new fleet of high-power electric locomotives to haul freight trains northward from Tokyo to Hokkaido, the sole member of the class, EF500-901, was built jointly by Kawasaki Heavy Industries and Mitsubishi Electric, and delivered to Shin-Tsurumi Depot in August 1990. The design was broadly based on the Class EF200 locomotives built for Tokaido Main Line freight duties west of Tokyo. Following initial test-running, the locomotive underwent long-term feasibility testing on freight services on the Tohoku Main Line. However, the locomotive fell foul of newly introduced government guidelines covering high-frequency ele