Shinjuku Gyoen National Garden In late March and early April, cherry blossom season, the central lawn areas are particularly stunning. Shinjuku Gyoen is open from 9 a.m. to 4 p.m. Tuesday through Sunday, and closed Tuesday in weeks in which Monday is a national holiday. Admission is about $2 for adults, less for students and children. Take the JR Yamanote line to Shinjuku, south exit; walk east down Koshu Kaido, a main thoroughfare. Or take the Toei Shinjuku line to Shinjuku-Sanchome.