page_title: 711 series
section_title: Prototype sets
hierarchical_section_title: 711 series / History / Prototype sets
caption_attribution_description: 日本語: 国鉄711系電車 S901編成 English: JR Hokkaido 711 series EMU formation at Sapporo Station, led by former prototype set S901
context_page_description: The 711 series was an AC electric multiple unit train type operated by Hokkaido Railway Company on Sapporo area suburban services in Hokkaido, Japan, from 1968 until March 2015. It was the first AC EMU train to be operated in Japan by the former Japanese National Railways. The last remaining trains in service were withdrawn on 13 March 2015.
context_section_description: Two prototype two-car sets, numbered KuMoHa 711-901 + KuHa 711-901 and KuMoHa 711-902 + KuHa 711-902, were delivered in February 1967 for test running ahead of the start of electric suburban services between Otaru and Takikawa from 1968. Both sets were based on the KiHa 22 diesel multiple unit design, but set 901 had opening two-pane windows and featured two sets of four-leaf folding doors per side, whereas set 902 had sealed double-glazed windows, as used on the subsequent full-production sets. The two sets were modified to full-production standards in 1968 and 1970, but set 901 retained its opening windows.
caption: Former prototype set S901 leading a 6-car formation at Sapporo, 1994
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