Umi Jigoku

The name of this Jigoku, “Umi”, came from its ocean blue color. That is why it is called the “sea hell”. This 200 meters deep cobalt blue pond of the boiling water (98 °C), emerged 1200 or 1300 years ago after a volcanic explosion of Mt. Tsurumi. This boiling pond is famous for its aquamarine water. Some 360 kiloliters (95,000 US gallons) of hot water containing about 1.26 metric tons of salt gush out of this pond daily. On the rocks around the pond is found a bacterial organism called sulfur moss, which lives on hydrogen sulfide. The beautiful color of the water is due to the iron sulfide found [Read more…]

Chinoike Jigoku

Chinoike Jigoku is called “blood pond hell” because of the red color of the water that emerges from the red clay. The red clay mud with iron oxide and magnesium oxide come out from the bottom of the pond and built up gradually for a long time. It’s the same as iron rust. Iron oxide and magnesium oxide naturally cause chemical reaction under high temperature and pressure. The water temperature of this pond is 78℃ (about 172℉). In the Bungo Fudoki (description of a natural feature in Bungo/Oita area), it was described as “red hot spring” and the oldest natural Jiogku in Japan. It was discovered more than 1300 years [Read more…]

Shiraike Jigoku

Shiraike Jigoku translates to “white pond hell” as “shira” means white color and “ike” means pond in Japanese. Its name comes from the colorless water that spouts from the ground naturally, turning a bluish white color once it joins the pond due to the decrease in temperature and pressure. This is a sodium chloride hot spring that contains boric acid and its temperature is 95℃ (203 ℉). The pond is surrounded by a traditional Japanese style garden and has a variety of large-sized tropical fishes, such as piranhas, are kept here and warmed by its water.

Kamado Jigoku

Kamado Jigoku or “cooking pot hell”, was named after an ancient myth in which people cooked rice by using gas from the springs that discharge at 90 ℃ (about 194℉) as an offering to the Ujigami (guardian god) for the festival of Kamado Hachimangu Shrine. A bright red demon called “oni” in Japanese standing on a huge cooking pot is the symbol of this Jigoku. The Jigoku features different kinds of ponds, such as a mysterious pond that changes color several times a year. Visitors to this Jigoku can sample the hot springs water, enjoy a hand and foot bath, and try various snacks that are cooked by the steams of the [Read more…]

Tatsumaki Jigoku

Tatsumaki Jigoku is a natural geyser that is designated as a natural treasure by the city of Beppu.The water temperature of this hot spring under the ground is 150°C(about 302 °F) and that of the surface is 101 °C (214 °F).It is an acidic hot spring with chloride.It spouts out the boiling water and steam as high as 50 meters (164 ft or 55 yards) and lasts for about 6 to 10 minutes in intervals of 30 to 40 minutes.Because it resembles the appearance of a tornado when it spouts,it was given the name Tatsumaki Jigoku or Tornado Hell.

Oniishibouzu Jigoku

Oniishi Bozu Jigoku was named after the region of Oniishi which translates to “devil stone” and “Bozu” which means a Buddhism monk in Japanese. Large and small bubbles of hot gray mud that boil up here look like the shaven head of a monk. The thick mud in the hot spring forms a monk’s head by the upward pressure of the geothermal energy. This is a sodium chloride hot springs with a temperature of 99 degrees C (210 degrees F). The gushing of these hot spring steams is very noisy. This noisy sound is called, “Devil’s loudly snoring”.

Oniyama Jigoku

Oniyama Jigoku is also known as “crocodile hell”. Since 1923, crocodiles had been bred and raised here. Currently, there are 70 crocodiles and alligators which slither down to warm themselves by the water. The water is 99.1 ℃ (about 210℉) and the steam is 110℃ (about 230℉).

Yama Jigoku

Yama Jigoku which means “mountain hell” has hot water and steam gushing out all over the mountain. Its name comes from the muddy mountain that formed over the years. This “Jigoku” is also a mini zoo where children can enjoy seeing different kinds of animals such as peacocks, flamingos, capybaras and a hippo that baths in a warm onsen pool.