姉し妹まい船せんしまいせんMeanings1nounsister shipRefers to a ship built to the same design as another, often in the same class or series.このフェリーは、先せん月げつ就しゅう航こうした船ふねの姉し妹まい船せんです。This ferry is a sister ship of the one that entered service last month.
