Save Type River & Settlement Usage Japanese Scripts 留萌(Japanese Kanji) るもい(Japanese Hirgana) Pronounced Pron. ROO-MO-EE [key·IPA] Meaning & History Possibly derived from Ainu ルㇽモオッペ (rur-mo-ot-pe) meaning "river with quiet tides" or "river where the tide is deep". This is the name of a river and city in Japan.