#2 When You are going to Onsen , take change only , Its a custom that Japanese people don`t like to carry lots of cash .
#3 After Onsen drink Coffee Milk.. (Local custom )
#4 Take 2 towels . One is big one for drying and other is a modesty towel to cover up or wash yourself with .Do not put modesty towel in bath .
#5 You must dry yourself before getting back to dressing room , so you dry yourself in shower room or doorway before entering dressing room .
#6 Don`t brush your teeth in Onsen ..
#7 People with big tattoos are not allowed in Onsen . Big tattoos means Japanese Mafia . Small ones are fine .
#8 Wash your body before taking a bath / Onsen .
#9 Take Onsen NAKED . Yep fully naked .
#10 Dont use swimming suits or any peace of clothing in Onsen .. So- Naked Just to confirm again !
#11 Dont take a bath /Onsen when drunk it coulb be dangerous if you wall a sleep or slip . (But i hear from few tourist that its fun , but would not recommend it )
#12 Dont swim in Onsen - Its a public space for everyone !
Have a great time in Onsen