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Jirak (ジラーク Jirāku) is a flying blue whale Kaiju that first appeared in the TV series, Ultraman Cosmos episode 16.


  • Jirak: Flying Whale (フライホエール Furai Hoēru)
  • Chaos Jirak: Spirit Parasite (精神寄生獣 Seishin Kisei-jū)


Ultraman Cosmos

One day, a girl named Akane Tachibana was ridiculed by her friends including a boy named Kota Noda for her dream to swim with a whale at the sea. Due to her depression, Chaos Header had overheard her wish and created an illusion of a flying whale. She was excited by this, and named it Jirak. After Musashi tried to explain to her that the whale was a trick, she denied it, due to having her will overwritten by the Chaos Header. The girl was absorbed by Jirak, and it transformed into Chaos Jirak, and proceeds to use its heat ray on Kota who had teased her earlier. Musashi turned into Ultraman Cosmos to stop the attack. Cosmos managed to outmaneuver it and used to Full Moon Rect. However, Chaos Jirak managed to overpower Cosmos with its electric energy whip. However, Kota managed to apologize to Akane for his earlier actions, and also promised her to make her dreams come true. This caused the beast to be paralyzed, which allowed Cosmos to quickly spirit her away. Chaos Jirak then disintegrated into light particles.


  • Jirak is represented completely by CGI.
  • Chaos Jirak is the only Chaos monster who has a subtitle in Ultraman Cosmos.
  • Chaos Jirak's roar is a reused Gagi roar.
  • Chaos Jirak's subtitle is shared with Alien Valkyrie from Heisei Ultraseven.
  • Chaos Jirak's Suit actor: Toshio Miyake

Tiga, Dyna, and Ultraman Gaia Novel: The Adventure in Hyperspace

A Chaos Jirak was captured by Charija as part of his monster business but was forced to be unleashed as vanguards for the Red Sphere. Chaos Jirak fought against Ultraman Dyna Strong Type and clashed with Psycho Mezard as they were on the receiving ends of Tiga's Runboldt Beam Shell and Dyna's Gulnate Bomber. Tiga, Dyna, and Ultraman Gaia Novel: The Adventure in Hyperspace


  • Charija stated that he obtained Chaos Jirak from a world whose Ultraman fights with the power of the Sun and the Moon.




  • Height: Unknown
  • Length: 150 m
  • Weight: Unknown
  • Origin: High over residential C1 area
Powers and Weapons
  • Levitation: Jirak can levitate for an undetermined amount of time.
  • Intangibility: Due to being an illusion, Jirak can be intangible to any objects.
  • Chaos Light Bullet: Jirak can fire a gigantic Chaos Light Bullet from its mouth.

Chaos Jirak

Chaos Jirak

Chaos Jirak (カオスジラーク Kaosujirāku) was the transformed state of Jirak after it was infected by Chaos Organism.

  • Height: 64 m
  • Weight: 56,000 t
  • Origin: High over residential C1 area
  • Weakness: Chaos Jirak is entirely tied to the negative emotions of Akane. By quelling her anger and purging her out, the Chaos Monster will disappear.
Powers and Weapons
  • Heat Ray: Chaos Jirak can fire orange heat beam from its mouth.
  • Energy Swords: Chaos Jirak can launch energy swords from its mouth. However, they are very easy to shatter.
  • Absorb: Chaos Jirak can absorb its own attacks if they are channeled back at it.
  • Electric Energy Whip: Chaos Jirak can create a pink energy whip from its left hand that can lift a like of Ultraman Cosmos with ease and produce electric shocks.


Ultraman Cosmos Kaiju
Ultraman Cosmos: The First Contact Alien Baltan (Basical, Shirubyi) | Don Ron | Clevergon
Ultraman Cosmos Chaos Header | Lidorias | Chaos Lidorias | Golmede | Chaos Golmede | Spittle | Igomas | Chaos Bug | Mogrudon | Mienin | Gamoran | Small Inculas | Inculas | Yamawarawa | Geshot | Mudon | Ephemera | Waroga | Galbas | Jelga | Jirak | Chaos Jirak | Ghighi | Renki | Alien Migelon | Angrilla | Bolgils | Parastan | Chaos Parastan | Chaos Parastan S | Gelworm M | Gelworm P | Imitation Ultraman Cosmos | Gragas | Alien Srayu | Guinje | Chaos Header Iblis | Zaranga | Baby Zaranga | Eligal | Chaos Eligal | Chaos Header Mebut | Clevergon | Chaos Clevergon | Golmede Beta | Neldorand | Chaos Neldorand | Reycura | Ragstone | Mahagenom | Taildas | Chaos Taildas | Alien Beryl | Helzzking | Neldorand II | Chaos Neldorand II | Puratea | Exter Raider | Sydevakter | Delgoran | Chaos Delgoran | Sol | Taildas Mechalator | Alien Nowar | Neldorand Mechalator | Ghighi Dr. XX01 | Mugera | Alien Kyulia | GiriBanes | Waroga II | Alukela | Snow Stars | Vadata | Mazalgas | Chaos Mazalgas | Sangelu | Alien Carpcis | Arados | Ragstone Mechalator | Tablis | Mitoru | Gamoran II | Kawanoji | Gruanfan | Giragas | Alt-Helzzking | Dolba | Chaos Dolba | Eligal II | Chaos Eligal II | Chaos Darkness
Ultraman Cosmos 2: The Blue Planet Parastan | Scorpiss | Sandros | Reija | Alien Gyashi | Shirubyi
Ultraman Cosmos vs. Ultraman Justice: The Final Battle Gloker Pawn | Gloker Mother | Mienin | Lidorias | Golmede | Don Ron | Bolgils | Gloker Rook | Gloker Bishop | Alien Gyashi | Shirubyi | Giga Endra | Delacion
Ultraman Gaia Kaiju
Ultraman Gaia Radical Destruction Bringer | Vision Dragon | C.O.V. | Geel | Apatee | Primal Mezard | Mezard | Bokurag | Gan-Q Code №00 | Gan-Q Code №01 | Tenkai | Anemos | Crabgan | Rezaito | C.O.V. II | Baby C.O.V. | Varsite | Mizunoeno Dragon | Wolf Gas | Psycho Mezard | Antimatter | Deents | Mother Deents | Alguros | Imit-Ultraman Agul | Diglobe | Zonnel | Psycho Mezard II | Lilia | Geschenk | Candea | Pazuzu | Gomenos | Zonnel II | Geel II | Zoruim | Mimos | Enzan | Rukulion | Gokigumon | Kijuro Mato | Gan-Q Code №02 | Aeroviper | Syazac | Wolf Fire | Algona | X-Savarga | Queen Mezard | Phantom-Ultraman Agul | Tigris | Tsuchikera | Pazgeek | Σ-Zuigul | Black Gamu | Satanbizor | Spirit Parasites | Bizorm | Izac | Super C.O.V. | Super Pazuzu | Blitz Blots | Tigris II | Shinryoku | Mokian | Deathbringer | Zebubu | Dobishi | Fishman | Kaiser Dobishi | Gomenos II | Geel III | Tigris III | Zonnel II | Syazac | Zog
Ultraman Tiga, Ultraman Dyna, & Ultraman Gaia: The Decisive Battle in Hyperspace Red Sphere | Satanbizor | King of Mons | Basiliss | Sculla
Ultraman Gaia: Gaia Again Gakuzom | Baiakuhe | Zonnel II | Rinar
Tiga, Dyna, and Ultraman Gaia Novel: The Adventure in Hyperspace Kaiser Gyrares XIII | King of Mons | Charija | Galra | Neo Geomos | Psycho Mezard | Chaos Jirak | Nosferu | Demon Gyrares XIV