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(いわ) (かさ)
A known image of Iwakasa in Cage in Lunatic Runagate



Unknown, deceased


Subordinate of the Emperor

Print Works

Iwakasa (岩笠) is a character who has thus far only appeared in Chapter 4 of Cage in Lunatic Runagate as Fujiwara no Mokou reminisces to Keine Kamishirasawa about her past. He was murdered by Mokou so that she could drink the Hourai Elixir when she was overcome by the desire for immortality.

Background Information

In Cage in Lunatic Runagate, Iwakasa is seen only from behind and shadows further obstruct view, but he appears to wear robes and have his hair in a martial ponytail. He is apparently based on the character Tsuki no Iwakasa, from the original Tale of the Bamboo Cutter.


Around 1300 years ago, he was a subordinate of the Emperor who was ordered to dispose of the Hourai Elixir. He meets Mokou on the way up Mount Fuji, and at the top, they meet Konohana-Sakuyahime, who tells them not to throw the elixir into the volcano, lest it become active and unstoppable even with her power. She tells them to dispose of the elixir on a different mountain. On the way down Mt. Fuji, Mokou kicks Iwakasa down a sharp decline, killing him, and steals the elixir.


Fujiwara no Mokou

Iwakasa was murdered by Fujiwara no Mokou in order for her to steal the Hourai Elixir and become immortal. She notes that one day, she wants to travel to the top of the Youkai Mountain, presumably to see Iwanagahime, the goddess of immortality, and to apologize to her for what she did to Iwakasa. (NB: The Youkai Mountain was once the mountain Yatsugatake, which is the mountain Konohana-Sakuyahime suggested to Mokou and Iwakasa to bring the elixir to instead.) In the fourth chapter of Cage in Lunatic Runagate, it's shown that her immortality was derived indirectly from Iwakasa as well, as he saved her life prior to her immortality. Mokou feels guilt for having disposed of him just for the sake of her revenge against Kaguya. Two of her spell cards (Limiting Edict "Curse of Tsuki-no-Iwakasa" and Forgiveness "Honest Man's Death") are named after him.

Official Sources

Official sources