page_title: 400 Series Shinkansen
section_title: History
hierarchical_section_title: 400 Series Shinkansen / History
caption_attribution_description: 日本語: 山形ジェイアール直行特急保有 400系電車 6両編成English: JR East 400 series 6-car shinkansen set at Yamagata Station in original livery
context_page_description: The 400 series was a Japanese Shinkansen high-speed train type operated by East Japan Railway Company between 1992 and 2010 on Tsubasa services on Japan's first mini-shinkansen line, the Yamagata Shinkansen branch from the main Tohoku Shinkansen.
  The fleet of 400 series trains was leased by JR East from the owning company, Yamagata JR Chokutsū Tokkyū Hoyū Kikō, a third-sector company jointly owned by JR East and Yamagata Prefecture.
  They were originally six-car sets, but a seventh car was added in 1995 to each set due to the popularity of the new Tsubasa services.
caption: A six-car 400 series set in original colour scheme
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