Many Japanese saunas emphasize cleanliness and quiet. Local rules vary, but several actions are commonly frowned upon. Beginners should learn what to avoid first to reduce mistakes.

Not rinsing off before the cold plunge

Entering the cold plunge immediately after leaving the sauna without rinsing is one of the most frowned-upon behaviors. Entering without washing off sweat looks unhygienic and gives a bad impression. It's basic to take a shower or pour water over yourself before the cold plunge.

Entering the cold plunge too aggressively

Avoid jumping in, splashing, or making waves. These actions can splash other guests and disturb those who want to enter quietly. Many facilities expect the cold plunge to be used quietly.

Hogging rest chairs

In crowded times, occupying chairs for long periods or saving spots with towels is likely to be disliked. Resting is important, but remember these are shared spaces.

Sitting down soaking wet

Sitting on a chair while still dripping after the cold plunge or shower makes it difficult for the next person. You don't need to be completely dry, but it's polite to settle yourself so large drops won't fall.

Loud talking or long conversations in the sauna room

In Japanese saunas, especially hotter rooms, people tend to keep quiet. Conversation isn't always banned, but loud or long chats are best avoided. Some facilities explicitly prohibit private conversations.

Bringing strong fragrances

Perfume, hair products, and strong body creams can spread scents more in hot spaces. Even if you don't mind, enclosed areas can burden others.

Bringing smartphones into the bathing area

Phones in the bathing area or sauna, even if not used for photos, can make people uneasy. From a privacy standpoint, it's safer not to bring them into the bathing area.

Entering after drinking alcohol

This is more a safety issue than etiquette. Sauna use after drinking increases the risk of dehydration and fainting and should be avoided. It's better to enjoy alcohol after your sauna.

Summary

What to avoid in Japanese saunas includes entering the cold plunge without rinsing, making noise, hogging space, and using facilities in ways that make others uncomfortable. In short, the focus is on cleanliness and consideration for shared spaces.

Even though rules vary by facility, sticking to these basics will keep you from making major mistakes. When in doubt, be quiet, keep it short, and observe those around you.