沖縄返還協定 おきなわへんかんきょうてい Okinawa Reversion Agreement (1971); Agreement between Japan and the United States of America Concerning the Ryukyu Islands and the Daito Islands n Advanced ➥
三陸沖地震 さんりくおきじしん Sanriku offshore earthquake (esp. June 15, 1896, March 3, 1933, and March 11, 2011); Sanriku earthquake n Advanced ➥
沖言葉 おきことば euphemisms used by superstitious sailors (e.g. calling sardines "sundries", whales "Ebisu", etc.) n Advanced ➥