The key allows the user to perform the Jigoku Kyūkyoku Ōgi, after they gain permission from Jigoku. Where the user must pull the circle within the key and slide it into the top part of it.
At some point in the past, Enma-Daiō entrusted the key to the Amami Tribe, who protected the key in secrecy. on Kikaiga Island and held by the tribe's chief. After the island was attacked Western Yōkai, the chief passed on the key to her daughter Miu. She passes the key on to Kitarō in order to revive the Yōkai boy.
|Applications||Instegram • Lein • U-Tube|
|Ghost Tribe||Chanchanko • Geta • Yōkai Ocarina • Yōkai Post|
|Common Objects||Bell of Dream Control • Gyogangan • Kaifukugan • Jōhari Mirror • Kokon Tōzai Yōkai Daizukan • Magic Stone • Yōkai Bat • Yōkai Camera • Yōkai Censer • Yōkai Glasses • Yōkai Incense • Yōkai Stone|
|Seals||Kaname Stone • Key of Iwaya • Octopus Kaname Stone • Spirit Paper and Brush • Yasakari Sphere|
|Weapons||Jigoku Key • Kiyome no Honō • Reirui Armor • Ring of Arcana|
|Applications||Curse App • Omega Talk|
|Others||Conscience Mold • Yōkai Mold|
|Vehicles||Clam Boat • Ghost Train • Phantom Train • Whale Blimp • Yōkai Car|