• Welcome to Touhou Wiki!
  • Registering is temporarily disabled. Check in our Discord server to request an account and for assistance of any kind.

Underground Geyser Center

From Touhou Wiki
Jump to navigation Jump to search
間欠泉地下センター (かんけつせんちかせんたあ)
Underground Geyser Center
Underground Geyser Centre
Toho hisotensoku-nuclear fusion reactor cored4.png
The Reactor Core of the Underground Geyser Center, as seen in Touhou Hisoutensoku

Deepest part of the Underworld; under Old Hell & Remains of Blazing Hell, connected to the Nuclear Furnace

Official Games
Print Works

The Underground Geyser Center (間欠泉地下センター kanketsusen-chika sentaa) is a facility under the surface of Gensokyo, under the base of the Youkai Mountain. Both the kappa and the gods at the Moriya Shrine perform a variety of experiments and research projects. It is connected to the Nuclear Furnace in the deepest part of the Underworld.


The Underground Geyser Center is the main location of Sanae's story in Touhou Hisoutensoku. She travels into it while following the giant robot, Hisoutensoku.

The facility also plays a large role in Wild and Horned Hermit. After the events of Subterranean Animism, there are still evil spirits lurking there, making it unfit for humans to be.


The Underground Geyser Center inspiration is the "Suwa Lake Geyser Center" (諏訪湖間欠泉センター Suwako Kanketsusen Sentā), situated near the Suwa Lake Geyser, the most active geyser in Japan. The center also serves as a tourist site as one of the nearby spa's facilities.