>Disappointed, tired, I saw on google maps there was an Onsen nearby (around 1h30 away) so I kept walking to Odaiba. The Onsen in question used to be open something like 23h a day which was great for me at 5am.
>Now that was one hell of a way to relax after that long walk. Never rested that hard in my life.
If the onsen you went to is the one I'm thinking of, I have some bad news: it closed in September of last year.
Much of Odaiba is currently closed for renovation/rebuilding.
LaQua is probably the closest equivalent now in Tokyo, although it lacks the {kitschy,fun} Ye Olde Tokyo theme of Oedo Onsen. But hey, you get a roller coaster instead.
If the onsen you went to is the one I'm thinking of, I have some bad news: it closed in September of last year.
https://www.timeout.com/tokyo/news/odaiba-hot-spring-theme-p...