Jigokunuma Pond

Located not far from Sukayu Onsen, this pond was created about 800 years ago by an explosive volcanic eruption in the Hakkōda Mountains. Covering roughly 4,500㎡, it formed when hot spring water bubbling up in the area collected in an old explosion crater. Even today, steam vents-remnants of past volcanic activity-dot the surroundings, and the distinct scent of sulfur hangs in the air. This eerie atmosphere is what inspired the name “Jigokunuma,” or “Hell Pond.”

The water in the pond is highly acidic, making it impossible for fish to survive, and with 90-degree hot water gushing out at 2,700 liters per minute, entering the pond is strictly prohibited. The stark, treeless landscape-where vegetation cannot grow-adds to the site’s uniquely desolate beauty. The vivid blue water set against the changing seasonal scenery of the Hakkōda Mountains, from fresh spring greenery to vibrant autumn foliage, creates a breathtaking contrast worth seeing at least once.

Nearby, you’ll also find Manjū Fukashi, where you sit fully clothed on a wooden box carrying 95-degree hot spring steam to warm your lower body. Be sure to stop by and try it.