Find the Best Tattoo Friendly Onsen in Kusatsu Onsen, Japan

Kusatsu consistently ranks as the number one onsen town in Japan — a volcanic village in the Gunma mountains where acidic mineral water pours from the earth at over 10,000 tons per day, built around the Yubatake (湯畑), a steaming hot spring field where everything starts.

What is the Yubatake?

The Yubatake is the heart of Kusatsu — a rectangular field of wooden channels where scalding water (50-90°C) cools as it flows toward the town’s bathhouses. Steam rises day and night. The mineral deposits turn the channels white and the water a milky blue-green. It is illuminated after dark, and a free footbath sits on the edge. You will pass through the Yubatake square multiple times a day — the town’s ryokan, restaurants, and sotoyu baths all radiate outward from it.

Next to the Yubatake, the Netsunoyu (熱乃湯) building hosts yumomi shows — a 400-year-old tradition where performers in traditional dress stir the hot water with long wooden paddles while singing folk songs, cooling it to bathing temperature. This is unique to Kusatsu.

Where should you bathe in Kusatsu?

All three of our verified listings are fully tattoo-friendly — a rarity for an onsen town of this stature. Sainokawara Open-Air Bath is the outdoor icon: a massive rotenburo in Sainokawara Park (西の河原公園) surrounded by forest, steam rising from hot spring streams across the park floor as you walk in. It is one of the largest outdoor public baths in Japan. Goza no Yu Onsen is our top choice, a modern facility right next to the Yubatake with multiple bath types fed by different source springs. Otaki no Yu Onsen is our best day-use pick — the awase-yu system lets you choose from tubs ranging from 38°C to 46°C, finding the temperature that suits you.

Kusatsu also has 19 small free sotoyu scattered through the residential streets. Three are open to visitors: Shirohata no Yu (白旗の湯), Chiyo no Yu (千代の湯), and Jizo no Yu (地蔵の湯). These hold two to four people each and run hot — Shirohata at roughly 45°C is for those who can handle it. The rest are for residents only, an everyday part of Kusatsu life.

How do you get to Kusatsu?

From Tokyo, the fastest route combines the Hokuriku Shinkansen to Karuizawa Station (軽井沢駅) in about 70 minutes, then a Kusatsu Onsen bus for 80 minutes. Alternatively, the JR Agatsuma Line limited express from Ueno runs to Naganohara-Kusatsuguchi Station (長野原草津口駅) in about 2 hours 30 minutes, then a 25-minute bus to town. The JR Pass covers the train portions.

Within Kusatsu, everything is walkable. The town climbs a hillside — the Yubatake sits at the center, Sainokawara Park is a 10-minute walk west, and the ryokan district wraps around the square. No car needed, no local transit required. The Choina Sanyumeguri combo pass covers Otaki no Yu, Goza no Yu, and Sainokawara at a discount — worth it if you plan to visit all three.

When should you visit Kusatsu?

Winter is Kusatsu at its most dramatic. Snow covers the town from December through March, the Yubatake steams harder in cold air, and Sainokawara Park’s outdoor bath becomes a scene of hot water, bare trees, and silence. The Yubatake night illuminations add blue and green light to the steam. Kusatsu is also a ski destination — the town operates its own ski resort.

Spring brings fresh green to the park trails and wildflowers along the hot spring streams. Summer is comfortable at Kusatsu’s 1,200-meter elevation when lower-altitude towns swelter. Autumn foliage peaks in mid-October, and the contrast between red maple leaves and white mineral deposits around the Yubatake is photogenic in every direction.