Okaeri nasai means "Welcome home" or "Welcome back." This is the response given to someone who says "Tadaima." It's a warm and welcoming greeting from those who were waiting at home. It acknowledges their return. Family members use this daily. "おかえりなさい！今日もお疲れ様でした。" (Welcome home! You worked hard today.).

「ただいま」と(い)言(い)って(かえ)帰(かえ)ってきた(ひと)人(ひと)に(たい)対(たい)して(い)言(い)う(ことば)言葉(ことば)です。(きたく)帰宅(きたく)を(かんげい)歓迎(かんげい)する(きもち)気持(きもち)です。「おかえりなさい！」