Rin Okumura
Shiro Fujimoto

Kurikara (倶利加羅 (クリカラ)  Kurikara) also referred to as the Kouma Sword (降魔剣 Kōmaken), is a Maken. It was originally held by the Myōō Dharani sect until it was given to Shiro Fujimoto. It currently holds Rin Okumura's demon heart and was used as his main weapon.


The Kurikara is a katana that is originally the personal weapon of Fukaku, the founder of the Myōō Dharani sect. After it came under the possession of Rin, Kurikara is often in a red sheath on Rin's back. Because Shiro's command to keep Kurikara with him at all times Rin even sleeps with it at night.

Ucchumusa Kirikura

Ucchumusa possessing Kurikara

The katana was made to house demons and at first, as it housed the fire demon known as Karura and later Shiro used it to seal away Rin's demon heart. Despite containing Rin's demon heart, it still possesses the ability to house demons as shown when the fire demon Ucchusma possessed it to use Rin's blue flames in order to purify the Impure King.

Because it contains Rin's demon heart, unsheathing Kurikara restores his Demonic nature and powers. Mephisto explains that this is because a demon's heart is the source of its powers and when displaying it allows one to draw out one's true power. However, unsheathing Kurikara also leaves Rin vulnerable as it is also his vital part, thus, destroying the blade could potentially kill Rin.[1] After learning to control his powers, Rin uses the Kurikara to channel his blue flames for attacks.


Kurikara was forged long ago to protect Kyoto from vengeful spirits who ran rampant. The founder of the sect, Fukaku, infused the Demon Karura inside the blade and with it, brought down the Impure King around 140 years ago. However, according to legends, Karura left the sword afterward. It then acted as the sect's main object of worship.

Shiro Fujimoto was tasked by Mephisto Pheles to retrieve the sword in order to "kill a child" with it and he initially intended to steal it, but after Shiro helped cure the sect of a miasma plague, he received Kurikara from Tatsuma Suguro as thanks for his help.

Shiro used the blade, with the aid of Mephisto, to seal Rin Okumura's Demon heart into the Kurikara at birth, thus fusing it with his blue flames inherited from Satan. This let Rin stay human for 15 years until the sword could no longer contain that power after which it came into Rin's possession.

After Rin attempted to rescue Yukio, he went berserk again after being shot in the forehead, throat, and throat by his brother[2], in response to this Satan blocked the strike and broke Kurikara causing Rin's demon heart to return to him. It is later delivered to Ossama by Konekomaru[3].

Anime Exclusive

In the anime, during Rin's battle with Amaimon during the ExWire's training in the forest, Kurikara was damaged and cracked. This allowed Rin's powers to overflow and the sword was no longer able to restrain his demon heart and nature from taking over. Using nails that contain special metal from the temple destroyed on Blue Night, a female blacksmith is able to restore the sword but warns Rin that it is not perfectly restored and that it could break again with no way to fix it.



  • Despite being broken in his confrontation with Yukio by their biological father, Kurikara breaking didn't kill Rin as Mephisto initially said, but it could have been that if Rin's heart returned to him, his full blue flames returning to him could've resulted in his potential death.
  • Kurikara takes its name from the sword wielded by Acala in myth.


  1. Ao no Exorcist Manga: Chapter 39
  2. Ao no Exorcist Manga: Chapter 96, Page 38
  3. Ao no Exorcist Manga: Chapter 99, Page 19


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