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The E261 series (Japanese: E261系, Hepburn: E261-kei) is an electric multiple unit (EMU) train type operated by East Japan Railway Company (JR East) in Japan on Saphir Odoriko limited express services between Tokyo and Izukyū-Shimoda. It was designed to replace the older 251 series trains that were used on Super View Odoriko limited express services from April 28, 1990, until March 13, 2020.