
Yes - if you want a quick seaside hot-spring fix, Atami is the easiest one from Tokyo (~50 min by Shinkansen). It's had a genuine revival, so the retro town feels lively rather than faded. The honest caveat: the sights themselves are modest - the point is the onsen, the sea and the atmosphere, not a checklist of must-sees. Lean into relaxing, ideally overnight.
Yes for a quick seaside onsen escape - it's ~50 minutes from Tokyo by Shinkansen and has a fun, revived retro vibe. The draw is the baths, sea and atmosphere rather than big sights, so it's best for relaxing, ideally overnight.
Both work. A day trip covers the views, beach and a day-use bath; an overnight in a seafront ryokan is the classic, more relaxing way to do it.