This article is about a/an rider in Kamen Rider Hibiki.

Kamen Rider Eiki (仮面ライダー 鋭鬼 Kamen Raidā Eiki, "Masked Rider Sharp Demon") is an Oni of the Kantō region, aided by the organisation Takeshi.

Background and Personality

Eiki was once a regular human with a regular name, but at one point he became associated with the organisation Takeshi and the Oni. He eventually became the apprentice of an Oni and was able to become one himself eventually, and adopted the name Eiki, meaning Sharp Demon. He has not yet gotten a supporter. During February of 2005, he was active on the dates 1-2 and 10-22.Melting Sea During April of 2005, he was active on the dates 1-10 and 18-30.Berserk Fate


Eiki 02

In the late summer of 2005, Eiki was following some rumors of Makamou activity to Kayanoki mountain and found evidence of a Tsuchigumo, but something was strange about its behaviour. He sent out his Disc Animals and was able to locate them. He called the Tachibana Sweet Place and reported to Hinaka Tachibana his suspicions and that he was going to exterminate it. He transformed and ran through the forest clad mountain until he found them in an old quarry. They taunted him to come their way and Eiki said he knew they were Tsuchigumo and that he had been looking for them. The Douji and Hime transformed into their armored forms and trans-morphed weapons. Eiki unholstered his Ongekibou as he noted they were warrior forms. They started duelling but the versatility of the Douji and Hime in the confined space proved too much. They knocked him down and the Douji stabbed Eiki in the leg with its weapon, while Hime knocked away one of his Ongekibou. Eiki saw not other way and started to flee until he came to a cliff. The Douji threw its weapon at him and it graced him hard enough so that he fell of into the river far below. Undying Malice

Some mountain folk found him and saved him from the stream. They got in contact with Takeshi and said that he was safe but hurt. Eiki spent the night with them and managed to heal his leg injury. On the next morning he headed back to his camp where Zanki and Ibuki's disciple, Akira Amami gave him the location of the Tsuchigumo.

Eiki 03

When Eiki arrived, Todoroki was halfway into the Makamou's mouth, so he ran and bashed the Makamou's head with his Kibōjutsu: Rekkadan charged Ongekibou. The impact made it release its grip on Todoroki and both Eiki and Ibuki ran up to him to see how he was. He was fine but Ibuki wondered about Eiki as well. The Oni replied that after a night's sleep he had restored his eiki(high spirits), so he was fine. They all rushed towards the Tsuchigumo, and Eiki jumped up on a rock to its side and attached his Ongekikou to use his Ongeki Da: Hissatsu Hitchū form, while Ibuki used his Ongeki Sha: Shippū Issen technique and Todoroki jumped up on it and used his Ongekizan Raiden Gekishin technique. They played until the Makamou started rampaging, destroying the rock Eiki stood on and shaking Todoroki of. They were about to follow it, but the Douji stood in their way. Eiki disarmed it and hit it twice with the Rekkadan, while Ibuki kicked it with his Kitōjutsu - Senpūjin and Todoroki slashed it with his electric charged Ongekigen which destroyed the Douji.

Eiki 04

The Oni ran after the Makamou, but when they caught up with it they saw that Hibiki had already defeated it. They greeted him and he greeted them back.Shining Boy

Arsenal and technique


Ongekibō: Rokushō

  • Henshin Onsa (変身音叉 Transformation Tuning Fork): A tuning fork transformation device.
  • Ongekiko: Hakuryoku (音撃鼓・白緑 Sound Attack Drum: White Green): A taiko buckle.
  • Ongekibō: Rokushō (音撃棒・緑勝 Sound Attack Club: Green Wins): A pair of drum sticks Ongeki weapon.


Eikis Honda CRV
  • Eiki used a silver colored Honda CR-V for transport.


  • Kitōjutsu: Onizume (鬼闘術・鬼爪 lit. "Demon Fighting Technique: Demon Claw"): Forms claws from his hands to stab and slash at Makamou. These claws are nearly unbreakable, thus making them one of Eiki's most useful weapons.
  • Kibōjutsu: Rekkadan (鬼棒術・烈火弾 lit. "Demon Club Technique: Raging Fire Bullet"): Eiki charges his drumsticks with power, igniting the tops with flames creating a torch-like weapon, which then can shoot fireballs from each one at a target.
  • Ongeki Da: Hissatsu Hitchū no Kata (音撃打・必殺必中の型 Sound Attack Stroke: the Certain Kill Hitting Target Style): Ongeki Finisher.

Behind the scenes


Eiki was voiced by the series' narrator Kazuya Nakai (中井 和哉 Nakai Kazuya). His suit actor was Naoki Nagase (永瀬 尚希 Nagase Naoki).


Eiki merchandise

Five figures of Eiki have been released as part of toylines based on Kamen Rider Hibiki. The first was a Hyper Hobby exclusive PVC figure which included his two Ongekibou. The figure was released alongside Danki and Sabaki in 2006 of the RHH Rider Hero Hibiki series. In 2006, Bandai released Eiki as part of the S.I.C. line, which included his Ongekibou, several Disc Animals and accessories. This was also a limited edition set that included Danki and Sabaki. In 2008, Eiki was part of the mini figure line HG 35 Kamen Rider ~ Insect Wars Edition ~. In June, 2009, Eiki was part of the SIC Takumi Special 3rd line alongside Sabaki and Danki. The last was a head sculpt of Eiki. released in 2012 as part of the 12th wave of the Rider Mask Collection.