The Seto (瀬戸) was a limited express Blue Train overnight sleeping car train service in Japan operated by Japanese National Railways (JNR) and later by West Japan Railway Company (JR West), which ran from Tokyo to Takamatsu in Kagawa Prefecture in Shikoku until July 1998.

[1][2] In its latter years, the Seto service was operated using 24/25 series sleeping cars.

[3] The train was hauled by a JR East Tabata (Tokyo)-based EF65-1000 DC electric locomotive throughout.

[2] From 10 April 1988, the service was rerouted to use the newly opened Great Seto Bridge, and operate between Tokyo and Takamatsu in Kagawa Prefecture.

[3] From the start of the revised timetable on 10 July 1998, the Seto services were discontinued and replaced by new 285 series electric multiple unit trains running as the Sunrise Seto together with the Sunrise Izumo.