noun
distant seas; far-off sea routes
A poetic or literary term for seas far away, often evoking a sense of distance and travel. Rare in modern everyday language.
八重の潮路を越えて、彼は故郷へ帰った。
Crossing the distant seas, he returned to his hometown.
Compound of 八重 (yae, 'many layers, manifold') and 潮路 (shioji, 'sea route, tideway'). The exact historical derivation is uncertain; the phrase appears in classical poetry and literature to evoke far-off sea journeys.