Traveling from Shinjuku to Shibuya is one of the most frequent commutes in Tokyo, and there are several efficient rail options. The most popular is the JR Yamanote Line (the green loop line), which takes about 7 minutes and departs from Platform 14 at Shinjuku Station. For a slightly faster trip, you can take the JR Saikyo Line or the JR Shonan-Shinjuku Line, which use different platforms (usually 1–4) but cover the distance in about 5 minutes as they make fewer stops. Additionally, if you are near the southern or eastern parts of Shinjuku, the Tokyo Metro Fukutoshin Line (subway) is an excellent alternative that connects Shinjuku-sanchome directly to Shibuya. All these lines are compatible with IC cards like Suica or Pasmo, and since the stations are only about 3.5 kilometers apart, trains run almost every few minutes throughout the day, making it nearly impossible to wait long for a connection.