
Yes — Yokohama is worth it, and it's so close (~30 min) it's almost a no-brainer for an evening. It does relaxed bayfront, big Chinatown food and a night skyline better than central Tokyo. The honest caveat: by day it can feel like a tidy shopping-and-harbour district; its magic is really at dusk, so time it for the late afternoon and evening.
Yes — it's ~30 minutes from Tokyo and does bayfront, Chinatown food and a night skyline beautifully. It's best in the late afternoon and evening rather than as a full daytime sightseeing trip.
It's different — calmer, breezier, with a real harbour and Japan's biggest Chinatown. As an easy evening escape from Tokyo's intensity, it's excellent.