Recommended Onsen Etiquette
The video above, "The Manner of ONSEN," does a great job introducing the traditional etiquette of Japanese hot springs for everyone from around the world. Hoshino Resorts breaks down onsen etiquette into eight visual and easy to follow rules.
The guide above, “Onsen Etiquette”, by Your Japan really helped us out when we were first going to onsens. We quickly adopted and practiced important rules such as no tattoos or clothing in the onsen area. We’d recommend saving this image on your smartphone while traveling, so that you always have it as a handy reference.
Another great resource that should help you to understand a lot about Japan is the Japan Trips & Travel Tips Reddit feed.