How to say “Where's the key which opens this door?” in JapaneseIn Japaneseこのドアを開(あ)ける鍵(かぎ)はどこですか。Kono doa o akeru kagi wa doko desu ka.▶ Hear it in JapaneseWhere's the key which opens this door? in other languagesWhat Where's the key which opens this door? meansIn PortugueseIn French