Formal — to staff
Train · Shinkansen
You
すみません、シートを少し倒してもよろしいでしょうか？
すみません、しーとをすこしたおしてもよろしいでしょうか？
Excuse me, may I recline my seat a little?
Romaji: Sumimasen, shito wo sukoshi taoshitemo yoroshii desho ka? / Reply Romaji: A, dozo, daijobu desu yo.
Reply
あ、どうぞ、大丈夫ですよ。
あ、どうぞ、だいじょうぶですよ。
Ah, go ahead, that's fine.
Gesture & etiquette
Turn around slightly, make eye contact with the person behind, and bow lightly while asking.
Never recline your seat suddenly without asking, especially if the person behind is eating, drinking, or using a laptop.
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