@Emmaizzy Hi Emma-san,
Yes, please enjoy the onsen with your son!
Onsen (pool) with swimsuits allowed:
There are Onsen facilities where you can wear a swimsuit, within 1.5 to 2 hours of
Tokyo. The atmosphere is like a leisure pool that uses hot spring water.
However, the changing rooms are separated by gender, so you won’t be able to help your son change.
– Yunessun (Hakone) : https://www.yunessun.com/global/en/
– Enospa (Enoshima) : https://www.enospa.jp/en/spa/poolarea-indoor
In Hakone, there is a team of physical therapists who support Onsen bathing, so if you use their service, they may be able to support your son’s changing.
Manyo Club:
Manyo Club is located in a place that is easy to access from Tokyo. The atmosphere is like a “hot spring in the city”.
– Tokyo Toyosu Manyo : https://tokyo-toyosu.manyo.co.jp/dayuseinfo/ (Japanese language site)
The Manyo in Toyosu has private baths, but you cannot make a reservation in advance.
However, you can reserve a private room with a Onsen bath in advance.
– Yokohama Manyo : https://www.manyo.co.jp/mm21/language/?mode=en
The Manyo in the Yokohama Bay area offers private baths that can be reserved in advance. The prices are reasonable.
Authentic Onsen (Hakone, etc) :
If you want to enjoy a truly authentic Onsen experience you can find in a guidebook, I think it’s best to go to a traditional hot spring resort!
For example, if you go to Hakone, which is 1.5 hours from Tokyo, there are so many private baths you could try that I can’t possibly list them all here. You can use a plan where the Onsen ryokan offers private baths during the daytime, and you can make a reservation in advance.
For example..
– Hakone Yuryo : https://www.hakoneyuryo.jp/english/
If you have any difficulties with reservations or anything else, please feel free to send us a direct message on tabifolk. ♨