Kusatsu Onsen Public Baths Travel Guide

The Three-Bath Pass: Best Value for Bath-Hoppers

If you plan to visit all three paid bathhouses, the "Choi-na Three Bath Tour Pass" (ちょいな三湯めぐり手形) costs 2,100 yen for adults and 1,050 yen for children. Without it, the total entry for all three facilities is 2,900 yen for adults — a saving of 800 yen. The pass has no expiry date, so you do not need to complete all three baths in a single day.

The pass is sold at the front desk of any of the three facilities. After you present it at each bath, staff stamp it. When you finish the third bath, you receive an original sticker; visitors who request it also get a printed certificate recognising them as a "Three Bath Tour Master." It is a minor detail, but a tangible souvenir for first-timers.

A practical note on sequencing: visit Goza no Yu first while you are still fresh and want to see the Yubatake area. Do Otaki no Yu mid-day for the Awaseyu temperature sequence. Save Sainokawara Rotenburo for late afternoon — if your visit falls on a Friday, you arrive in time for Mixed Bathing Day at 17:30, which is not replicable at the other two baths.

Free Public Bathhouses

Kusatsu maintains several free public bathhouses run by the local municipality. These are genuine neighbourhood baths used by residents and are smaller and quieter than the paid facilities. Etiquette is identical to any public onsen: wash thoroughly at the shower stations before entering the communal tub.

Jizo no Yu stands two minutes on foot from the Yubatake and opens from 08:00 to 22:00 — the longest hours of any free bath in town. Its central location makes it easy to slot between sightseeing. Chiyo no Yu is the smallest of the free bathhouses, open 09:00–17:00, and offers an intimate, low-crowd experience. Both are free of charge, though a small voluntary donation box is typically present at the entrance.

Free footbaths are scattered around the Yubatake perimeter and inside Sai no Kawara Park. These are open-air foot soaking stations with no time limit and no fee. A 15-minute footbath between bathhouses is a good way to rest legs and keep body temperature stable, particularly useful during winter when walking between baths in cold air.

Bathing Etiquette: What to Know Before You Enter

Japanese public baths follow a set of shared rules that keep communal spaces clean and comfortable for everyone. First-time visitors who understand these before arriving avoid awkward moments at the entrance.

• Wash your entire body at the shower stations before entering the communal tub. Soap and shampoo are provided at most facilities; confirm at the counter if unsure.
• Do not submerge your towel in the bathwater. Fold your small towel and place it on your head or leave it outside the tub.
• Remove all jewellery before bathing. Kusatsu's acidic water can tarnish metals and is abrasive on sensitive skin.
• Enter quietly, keep voices low, and avoid splashing. The bath is a shared relaxation space, not a swimming pool.
• Limit time in the tub to 15–20 minutes per session, then cool down before re-entering. Kusatsu's water is exceptionally hot and acidic — overexposure causes skin irritation, especially for those unaccustomed to sulfuric baths.

Kusatsu's spring water has a pH of around 2, one of the most acidic of any major Japanese onsen resort. This acidity is what gives the water its reputed bactericidal and skin-smoothing properties, but it also means that minor open cuts, recent shaving, or sunburned skin will sting. Most regular bathers spend 20–30 minutes per bath before switching facilities, which is a sensible pace across town.

Tattoo Policy at Kusatsu's Public Baths

Kusatsu is one of the most tattoo-inclusive hot spring destinations in Japan. The town's three main day-use public baths — Sai no Kawara Open-Air Bath, Otaki no Yu, and Goza no Yu — all accept guests with tattoos. This is not the case in most major onsen towns, making Kusatsu a genuine option for tattooed travellers who want access to communal public baths.

Individual ryokan with shared indoor baths are a different matter. Some properties restrict tattooed guests from the communal facility, even if the three main day-use baths permit it. The safest approach is to confirm directly with the ryokan when booking. Alternatively, book a room with a private open-air bath attached, which sidesteps the communal policy entirely.

Private bath rentals at Otaki no Yu are available for any guest at 2,000 yen per hour with no occupancy limit — this is also the most practical option for tattooed guests staying at a ryokan whose communal bath has restrictions. Book by phone when you arrive in town rather than assuming walk-in availability during peak season.

Yubatake: The Heart of the Town

The Yubatake is the symbolic and functional centre of Kusatsu Onsen. Spring water ranging from 50°C to 90°C flows through seven wooden channels that stretch across a wide open field, cooling the water passively without any dilution before it is distributed to the bathhouses. The field continuously emits steam, creating the sulfuric atmosphere that defines Kusatsu's streetscape.

By day the water appears emerald green from the mineral content. After dark, lighting turns the steam purple and the channels glow — the night view draws as many visitors as the daytime spectacle. Free footbaths line the perimeter of the Yubatake and are open year-round. Shops selling onsen manju, onsen tamago, and Kusatsu glass souvenirs cluster along the two main streets that converge on the field.

The Yubatake is the logical starting point for a bath-hopping day. Goza no Yu is directly adjacent. Netsu no Yu, where the Yumomi show takes place, is a two-minute walk. Sai no Kawara Park and its rotemburo are a 10-minute walk north. Knowing the geography saves time and makes the circuit feel natural rather than rushed. Read more in the full guide to Kusatsu Onsen Travel Guide.

Yumomi and Dance at Netsu no Yu

The Yumomi and Dance show at Netsu no Yu is one of Kusatsu's most distinctive cultural experiences. Performers use wooden boards roughly 180 cm long to rhythmically stir the scalding spring water while singing traditional Kusatsu folk songs. The practice dates to the Edo period (1603–1868), developed specifically because Kusatsu's water is too hot to bathe in without cooling and cannot be diluted with cold water without weakening its medicinal properties.

Shows run six times daily. During winter (December to February), morning performances are at 10:00, 10:30, and 11:00, with afternoon shows at 15:30, 16:00, and 16:30. Admission is 700 yen for adults and 350 yen for elementary school students. Tickets are sold at the venue from 30 minutes before each show; reservations are not accepted. Popular sessions sell out, so arrive early.

On select days, a Yumomi Experience session runs from 11:30 to 12:50 for 300 yen per person (elementary school students and older). Participants take a turn with the wooden boards under instruction. It is a hands-on alternative if you prefer participation over watching — check the day's schedule at the Netsu no Yu entrance when you arrive. More detail on the Yumomi Show at Netsu no Yu.

Getting to Kusatsu from Tokyo

Three routes connect central Tokyo to Kusatsu, each with a different balance of cost, travel time, and convenience.

• Limited Express "Kusatsu/Shima" from Ueno Station to Naganohara-Kusatsuguchi, then a JR bus for approximately 25 minutes to the town centre. Total journey around 3 hours, approximately 6,000 yen one way. No transfer to Shinkansen required; the train ride through Gunma's mountain scenery is enjoyable.
• Hokuriku Shinkansen from Tokyo Station to Karuizawa, then transfer to a highway bus. Around 2 hours 30 minutes total, approximately 8,500 yen. Faster but more expensive; the Karuizawa connection allows a brief stop on the way.
• Express bus (Joshu Yumeguri-go) from Tokyo Station or Busta Shinjuku, direct to Kusatsu Onsen. Around 4 hours, from approximately 3,500 yen one way. The most economical option and convenient because it stops in the town centre without a bus transfer. Additional express bus routes depart from Shibuya, Yokohama, Omiya, Ikebukuro, and Kichijoji.

Cash is the dominant payment method in Kusatsu. Most restaurants, souvenir shops, and smaller bathhouses do not accept credit cards. ATMs are available at the convenience stores in town, but there are few of them. Withdraw sufficient cash before leaving Tokyo or at Naganohara-Kusatsuguchi station. For seasonal timing, see the guide to the Best Time To Visit Kusatsu Onsen Travel Guide.

Volcano Alert and Current Safety Status (2026)

Since August 2025, Japan's Meteorological Agency has maintained an eruption alert at Level 2 for Mount Kusatsu-Shirane, specifically around the Yugama Crater. The crater area itself is a restricted zone and cannot be visited. Part of the Shiga Kusatsu Kogen Road (National Route 292) remains closed to traffic as a precaution.

Kusatsu Onsen town is located more than approximately 5 kilometres in a straight line from the Yugama Crater. The mayor of Kusatsu Town has formally confirmed that the hot spring town, its bathhouses, and all standard tourist areas are safe and unaffected. Onsen bathing, the Yubatake, Sai no Kawara Park, and all three main public baths operate normally.

Travellers arriving by car from the Shiga Kogen side need to plan a detour route as Route 292 is closed on the Shiga Kogen approach. Those arriving from Tokyo by train or bus via Naganohara-Kusatsuguchi are not affected — that access route does not use the closed section. Check current road conditions with your accommodation if you are driving from Nagano Prefecture.

Private Hot Springs and Ryokan Stays

Private onsen rooms and reservable private baths are the best option for couples, families, groups with tattoos, or anyone who prefers not to use communal facilities. Kusatsu has a range of accommodation covering both historic small ryokan and modern resort hotels, so the choice depends on budget and the type of bathing access you want.

Rooms with private open-air baths allow guests to soak at any hour without time pressure or shared space concerns. These are the most sought-after room types in Kusatsu and book quickly around autumn leaf season (mid-October to mid-November) and winter weekends. Book several weeks ahead for these periods.

If a private room bath is out of budget, Otaki no Yu's private bath rental (2,000 yen per hour, no occupancy cap, barrier-free and wheelchair accessible) fills the same need as a day-use option. Telephone reservations are accepted. For accommodation options, Where To Stay In Kusatsu Onsen Travel Guide covers the full range from budget to ryokan.