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「ただいま!」「おかえりなさい。」
"I'm home!" "Welcome home."
Polite greeting used to welcome someone who has returned home or back to their usual place.
おかえりなさい、今日も一日お疲れ様でした。
Welcome home, thank you for your hard work today.
Standard polite response to ただいま (tadaima).
Always remember the set pair: the person arriving says 「ただいま」(tadaima), and the person waiting at home responds with 「おかえりなさい」(okaerinasai).
Keep 'nasai' (おかえりなさい) for standard polite interactions. Drop 'nasai' to use 'okaeri' (おかえり) when speaking casually to family members, close friends, or kids.
Formed from the honorific prefix お (o-) + 帰り (kaeri, noun form of かえる 'to return') + なさい (nasai, polite imperative suffix derived from なさる).
Used by household members or colleagues when someone returns to the home or office. In casual settings with close friends or family, it is commonly shortened to おかえり (okaeri).