Beppu is a city famous for their hot springs.
We introduce you to Hyotan hot spring, where even Muslim people that are prohibited to show their skin, can enjoy private baths.
http://www.hyotan-onsen.com/english/family.html
How about relaxing at the hot spring in Beppu for the long holiday?
There is also Muslim-friendly MAP for Beppu City available.
https://halalmedia.jp/archives/1703/muslim-friendly-map-beppu-city