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すみません、JR山手線、新宿方面のホームはどこですか？
すみません、JRやまてせん、しんじゅくほうめんのホームはどこですか？
Excuse me, where is the platform for the JR Yamanote Line towards Shinjuku?
Romaji: Sumimasen, JR Yamanote-sen, Shinjuku hōmen no hōmu wa doko desu ka? / Reply Romaji: Achira no kaidan o agatte, hidarite ni gozaimasu.
Reply
あちらの階段を上がって、左手（ひだりて）にございます。
あちらのかいだんをあがって、ひだりてにございます。
Go up those stairs over there, and it's on your left.
Gesture & etiquette
Point in the direction you are looking for, or show the station staff a map/screenshot if available.
Always be specific about the line name and direction as many stations have multiple lines and directions.
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