外海 がいかい Also written そとうみ Meanings Noun ocean; open sea Kanji 外 outside. Read as ガイ. 海 sea. Read as カイ. Example sentences その船は漂流して外海に出た。The boat drifted out to sea. 潮流がその船を外海へと漂流させた。The tide carried the boat out to sea. Jinuma: Japanese Dictionary · Word lists