Hamamasu Onsen - Hokkaido

Hamamasu Onsen or Hamamasu Spa (浜益温泉) is one of the best day-trip onsens of Ishikari City. It is located at Hamamasuku Mita, Ishikari City in Hokkaido Prefecture, Japan.


Hamamasu Onsen

Hamamasu Onsen details

If you find yourself driving along Route 231 in Hokkaido, make sure to take a detour to Hamamasu Onsen in Hamamasuku Mita in Ishikari City, and experience the healing powers of its hot spring waters. Once a village recreation center, Hamamasu Onsen has transformed into a go-to destination for locals and tourists alike who seek to relax and unwind.

Hamamasu Onsen - Ishikari City, Hokkaido Prefecture

Upon arriving, you’ll be greeted by a spacious free parking lot, a relief for those who travel by car. An adult hot spring fee of 500 yen is required to get in, which is more than reasonable considering the amenities and the health benefits you can receive from it.

The Ishikari Pokemon manhole cover can be seen outside Hamamasu Onsen

Ishikari Pokemon manhole cover

The area behind Hamamasu Spa

Inside, you will find a normal bathtub, a bubble bath, a cold bath, and a sauna in the indoor bath area. Nine washrooms equipped with rinse-in shampoo and body soap are available for convenience. The beauty of Hamamasu Onsen, however, is in its open-air bath, where you can enjoy the hot spring water while being surrounded by the mountains and countryside.

Inside Hamamasu Onsen

The open-air bath can accommodate about 20 people, and several chairs and a small climb are available for relaxation. During summer, guests can also use the washing area in front of the open-air bath for an even more refreshing experience. The water is colorless and transparent, though you may notice a slight sulfur smell. This smell is due to the minerals in the water, which make it an effective treatment for neuralgia and muscle pain.

Hamamasu Onsen facility

Hamamasu Onsen's indoor onsen

Hamamasu Onsen's outdoor onsen

Adjacent to Hamamasu Onsen is a park golf course and downstream beach facilities, making it a perfect destination after a day of camping or sports. You can also take advantage of the onsen's hall, restroom, and Japanese-style room after bathing.

Team Nicerio visits Hamamasu Onsen

My family and I visited Hamamasu Onsen during our Mashike – Ishikari Road Trip last September 4, 2022. It was my 307th day here in Japan as an ALT under the JET Programme. It was our last destination before we wrapped up our road trip. What I like about this onsen is that it has beautiful relaxing scenery. The water is not that hot compared to the other onsen places that we have visited but it was fine by me as I still enjoyed the experience.

Hamamasu Onsen Fees

To use the onsen of Hamamasu Onsen, visitors need to pay the following fees:

Adults – 500 yen
Children – 250 yen

Hamamasu Onsen Operating Hours

If you’re planning to visit, please take note of Hamamasu Onsen's business hours. From April to October, it’s open from 10:00 am to 9:00 pm while from November to March, it’s open from 1:00 pm to 8:00 pm except for Mondays, where it opens at 10:00 am. Hamamasu Onsen is closed every month on the 1st (next day for Saturdays, Sundays, and public holidays), New Year's Day, and in May and August.

Why visit Hamamasu Onsen?

Whether you’re a local seeking to unwind or a curious traveler discovering Hokkaido for the first time, make sure to add Hamamasu Onsen to your itinerary and experience the soothing waters it offers. If you are looking for the Ishikari Pokefuta then you should visit this place.

Getting to Hamamasu Onsen


There is no public transportation that would bring you to Hamamasu Onsen. The only way to get there is by private vehicle.

Take Route 231 towards Rumoi from the Sasson Expressway "Sapporo Kita IC," turn right at Kashiwagi (intersection), and enter Route 451, about 3.5km (about 90 minutes).




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