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The is a rapid train service in Japan operated by West Japan Railway Company (JR West) and Shikoku Railway Company (JR Shikoku) since April 1988. The "Marine Liner" links Okayama, the capital city of Okayama Prefecture and a major station on the Sanyō Shinkansen, with Takamatsu, the capital city of Kagawa Prefecture on the island of Shikoku, via the Great Seto Bridge. Operating at a top speed of 130 km/h (81 mph), the journey takes approximately 52–63 minutes.