The idea is to experience the experience and not just be satisfied with seeing. We purchased prepaid cards (not expensive). We drove to Odeiba in Monorail, and you could use the usual Passmo card.
You come to the onsen, get a simple explanation. Gets a kimono, enters the main hall where everyone is dressed in a kimono. What was authentic - 90% are Japanese and very few tourists.
Then, to the baths themselves, men and women split into a trap and then went into the water completely without a garment
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