What to bring to onsen: complete onsen packing checklist

Onsen etiquette starts with preparation. Most public baths in Japan provide or sell some items, but not everything—especially towels, toiletries, and conveniences for changing rooms. If you want a smooth arrival, pack with the assumption that you might need to bring basics yourself, then confirm options once you’re at the facility.

Begin with the essentials that every onsen guest should have: swimwear is optional in most traditional settings, but you must be comfortable with the rules of the facility you choose. Bring a small bag to separate wet and dry items, and choose clothing you can remove quickly. Planning for wet areas matters: floors get slippery, and locker space can be limited.

Next, consider your bath routine. You’ll wash thoroughly before entering the bath, which means having the right toiletries—at least shampoo and body soap if the onsen doesn’t provide them. Many places provide basic amenities, but quality and availability vary, especially in smaller regional towns. If you have sensitive skin or specific products, bring your own.

Towels are the biggest “surprise” for foreigners. In many onsen, you’ll need a hand towel for washing and a separate towel for drying. Some facilities rent towels; others require you to bring your own. Don’t assume bath towels are allowed in the bathing area—rules differ, so follow facility signage and staff guidance.

For comfort outside the bath, plan for changing, storage, and getting back to your hotel. Pack slippers or easy-to-clean footwear if you’ll be walking in and out of indoor areas. If you’re doing multiple onsen visits in one trip, reuse a small dry kit and keep a spare plastic bag for damp clothing. Finally, keep an emergency layer—cold lobbies and early mornings can be chilly.

Use this checklist as your “onsen day kit.” It’s designed for typical public baths and ryokan-style facilities, but it also helps if you’re booking a day pass to an urban sento. Bring what you need, buy or rent what’s available on-site, and you’ll spend less time troubleshooting and more time enjoying the water.