First stop after arrival : Sainokawara Park and its famous open air hot springs. I couldn't stop admiring the emerald green waters that must be filled with all kinds of minerals good for the body. The bright autumn colours around us made it even more perfect.

A very beautiful park, not so big but worth a visit the get a peaceful time. I visited this place twice in summer and winter. All seasons seem to be beautiful here honestly. In winter, I could warm my hands by soaking them in the warm waters running through the park. The open onsen nearby is also a must to have a perfect complete trip.

Want to see hot spring water flowing into a river. This small park with its short walk is beautiful! Dip your hands into the multiple small streams and feel warm spring water. Amazing

Worth going to. Shopping and eating street leading to the park entrance. Myriads of foot hot springs flowing down from the mountain. Picturesque scenery and fresh air leading to hiking trails and the famous open air onsen.

Beautiful park with a public bath. Access from Yubatake by foot only or parking lot along the way to the highest point (public road) in Japan

Very nice open baths for your feet. Great nature park with steaming onsen holes

Wonderful spring water park, open to the public, leading up to a small shrine and then the Sainokawara Onsen at the end of the park.

Nice park with many small ponds with hot onsen water.

Calm place to wander around when near Yubatake. Theres a foot bath area and the park leads to the sainokawara bath at the end.

The park is not huge, spent like 40 mins. Very interesting seeing onsen water from the little ponds. There were few spots you can enjoy a foot bath, remember to bring a towel & not to wear very tight pants so u can enjoy it. Nice scenes.

Recharge at Kusatsu Onsen! Having spent a day in the great outdoors, it is time to relax in one of Kusatsu’s natural hot spring baths, commonly known as onsen. Bathing has been a major part of Japanese culture since antiquity, and Kusatsu Onsen’s baths are a fantastic chance to dip your toe (and more!) into this essentially Japanese cultural experience. Do not just take our word for it either—Japan’s major travel agents have voted Kusatsu Onsen the number-one onsen in Japan for over sixteen years in a row. The bountiful waters drawn directly from the Yubatake hot spring fields naturally contain acid, sulfur-containing aluminum sulphate, and chloride, with pH values between 1.7 and 2.1, and temperatures varying between 51 and 94 degrees Celsius. An iron nail placed in the hot spring would be reduced to rust in just nine days. But do not worry, the centuries-old yumomi method of cooling the water makes it perfectly safe for everyone to enjoy, and the accompanying ceremony is now a local attraction, with regular demonstrations enlivened by folk songs. The rich mineral content of Kusatsu’s waters have become known for their metabolism-boosting effects and as a natural way to promote more beautiful skin. The hot springs are also said to be beneficial for a variety of conditions, including muscle pain, bruises and sprains, fatigue recovery and more. Said to cure basically everything except lovesickness, you are bathing in good company—even the leaders of the Tokugawa shogunate during the Edo period (1603–1867) ordered barrels of hot spring water to be delivered to Edo Castle.

It's a very nice place to visit. I went there during the evening just before going to the Onsen. It's a beautiful harmony between the flowing water, the sound, the steam, the trees and the lights.

We came on a Tuesday 11am, but they closed for some unknown reason so we were a bit bummed out, but the scenery + environment outside the hotspring was great, there was also free footbaths too.

Beautiful winter light up. A really gorgeous garden with steam coming from the hotspring streams!

Small but pretty park in Kusatsu. It has a nice Onsen at the far end. It looked especially beautiful lit up at night in the snow.

Scenically beautiful both in the day time and at night. I found exploring the various loops and up the stairs to the Shrine prior to checking out the outdoor Onsen the most enjoyable parts.

Lovely walk in a park with onsen pools steaming up. Beautiful view and you cannot find this anywhere else. You could also soak your foot in one of the pools. Temperature is not very hot. Wish it could be hotter.

It's really amazingly beautiful. I can't stop talking hundreds of photos. There are many different styles of hot spring, cottage, light and landscapes

Beautiful scenery leading up to Sainokawara onsen at the end. The park itself was beautiful and a nice walk where you can also dip your feet or hands into some of the onsen. The main rotenburo or outdoor hot spring was quite simple. Perhaps in autumn or winter season it would be much better to go since we went in summer.

I visited there ay night. I think maybe visiting at night is better because no one was there at nighttime. I took a foot bath there that was awesome but you definitely need to bring your towels unless you wear your socks with your wet foot.

This is a must visit when you come to Kusatsu. To reach the open air bath, you need to walk through the park and it is a very pleasant walk with many photo spots. The open air bath is a must try. It costs 600 yen but there is no towel nor shower. If you don't want to spend over 1000 yen to buy a towel, you should take it from your hotel and bring along. It is a huge open air bath with excellent view. You probably need to spend 2 hours in total when visiting this park.

Walking distance from the center of Kusatsu, a must when you’re there, also there in an open onsen on the hill right next to the park (600 yen for an adult), some places of the bath have roof so you can enjoy even its raining or snowing

Such a lovely park! You need to walk through the park to reach the Sainokawara Open Air Bath. There are also two public foot baths and some seating area around the park. We came here twice, in the day and night. The mood at night is different and nice too. Really pleasant and tranquil here.

I visited in April the weather was perfect 😊 The place is just 10 mins walk from Yubatake and it really worth a visit! Please don't miss the chance!

Excellent, never seen before boiling hot streams gushing down a valley. If you have time enough there is also an open air onsen, for a small fee though. Definitely also a place where we would bring our young kids to see and experience for themselves.

Visited on Jan 8, 2019: Nice and quite park, whit a hot water river who’s flow through the park. There is also a nice onsen located at the top end of the park. Nice little hike around this natural place, if you have time, you can spend a lot time her.