noun
castaway; person adrift at sea
Refers to someone drifting at sea or stranded on an island after a shipwreck or similar event.
彼は無人島で漂流者として数年間生き延びた。
He survived for several years as a castaway on a deserted island.
救助隊は海で漂流者を発見した。
The rescue team found a person adrift at sea.