Formal — to staff
Shinkansen · Train
You
すみません、席を少し倒しても大丈夫ですか？
すみません、せきをすこしたおしてもだいじょうぶですか？
Excuse me, would you mind if I recline my seat a little?
Romaji: Sumimasen, seki o sukoshi taoshitemo daijobu desu ka? / Reply Romaji: A, hai, daijobu desu yo. Dozo.
Reply
あ、はい、大丈夫ですよ。どうぞ。
あ、はい、だいじょうぶですよ。どうぞ。
Oh, yes, that's fine. Go ahead.
Gesture & etiquette
Turn around slightly to make eye contact with the person sitting behind you and bow your head politely.
Never recline your seat suddenly without checking behind you, as you might spill the passenger's drinks or hit their laptop keyboard.
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