Yokohama (Minato Mirai, Cup Noodles Museum, Chinatown)

Yokohama is Tokyo's most underrated day-trip, just 30 minutes from Shinjuku on the JR Shonan-Shinjuku Line, combining Japan's largest Chinatown (free to explore, famous for pork buns at 500 JPY), the Minato Mirai waterfront, and the Cup Noodles Museum where families can design their own instant ramen cup for 500 JPY. The Cosmo World amusement park in Minato Mirai is free to enter with individual ride tickets from 700 JPY, while the Yokohama Landmark Tower Sky Garden offers city views for 1,000 JPY. TripAdvisor community data rates the Cup Noodles Museum as one of Japan's best interactive museum experiences for children, with near-universal praise for the DIY noodle workshop. Hakkeijima Sea Paradise nearby adds an aquarium (2,700 JPY) and theme park rides.