However, the Maizuru Nishi Port, port for foreign trade, functions not only as a commercial port but also as a fishing port; therefore, there was difficulty in operating service for large-scale container vessels which have recently played a leading part in marine transportation.
しかし、外国との貿易港である舞鶴西港は、商港でありながら漁港でもあるため、近年海運の主役となっている大型コンテナ船の就航が難しかった。