If you're like me and get a bit squeamish during your first time at an onsen, Oedo Onsen Monogatari in Odaiba provides the perfect solution for dipping your toes in rather than jumping into the deep end from the get-go. Upon arrival, guests are asked to take off their shoes and leave them in the shoe cupboards that come with a lock and key. Then, after getting a wristband with a key and bar code (used to keep track of what you bought) on it, guests choose their yukata (there were several gorgeous designs), get changed and spend the day however they wished: the foot bath & garden outside were very lovely, there's a sauna section (extra costs included) with rooms inspired by the seasons with different temperatures in each room, there's a nap room where guests get their own TV with the type of big, fancy cinema chairs, as well as an array of restaurants with the most delicious-looking Japanese cuisine one could possibly ask for. There were also a few live performances and a little arcade to make for the most fulfilling day. Admission fees are cheaper at night, but it did become increasingly crowded as the day progressed, so I would definitely recommend heading there early to avoid the crowds. An overall wonderful experience and would definitely recommend adding it to your list of things to do in Tokyo.