King Jaigrasu
King Jaigras
Home world: Space
First appearance: Jumborg Ace episode 1 "A Gift From the Emerald Star"
Latest appearance: Jumborg Ace Episode 21: "Mystery! Monster Graveyard in Space"
Height: 65 m
Weight: 50,000 t
Category: Kaiju
Affiliation: Anti Go-Ne
Roar(s): TBA
King Jaigras (キングジャイグラス Kingu Jaigurasu) is the first kaiju to appear in the Jumborg Ace TV series.

Subtitle: Colossal Arm Monster (巨腕怪獣 Kyowan Kaijū)


  • Height: 65 m
  • Weight: 50,000 t
  • Origin: Space → Okutama


Jumborg Ace

King Zaigrasu is the first of the monsters dispatched by Anti Go-Ne. Anti Go-Ne created him using a lizard from Okutama mountain. He tried to destroy the Okutama dam, but retreated when PAT attacked. Later, he came to Tokyo Bay and appeared in the industrial area, this time, even Pat's attacks could not hinder him. Jumborg Ace transformed to confront him. King Jaigras started using his powers on Jumborg Ace, in the end he was decapitated by Jumborg Ace using the heading killer.


  • King Jaigras' suit would later be modified for the Fireman kaiju Blacker.
  • King Jaigras' tail would later be reused for the Ultraman Taro kaiju Okariyan.
  • King Zaigrasu is one of the five monsters used in the Grave Yard in space to fight Jumborg Ace, appearing as Ghost King Zaigrasu, while Wutan attacked Earth.
  • King Jaigras was originally named Lizard King but was cut for unknown reasons.
  • Since all of Jumborg Ace's monsters have reused or modified roars, King Jaigras has a reused Magular roar.
  • Design: Yoshiaki Yoneya

Powers and Abilities

  • Flames: King Jaigras can fire a deadly stream of flames from his mouth.
  • Smokescreen: King Jaigras can breathe smoke from his mouth.
  • Strength: King Jaigras boasts superhuman strength.
  • Tail: King Jaigras can strangle enemies using his long tail.
  • Fangs: King Jaigras has teeth stronger then diamonds.


Jumborg Ace Kaiju & Mechas
Jumborg Ace Alien Gross | Anti Go-Ne | Alien Emerald | King Jaigras | Rubangar King | Chitanga | Giant Robot Zero | DeathKong King | Mons Robo | King Deadgone | Glass King | King Ginger | Flight King | Remodled Flight King | Dokuros King | Golden Arm | DeadFire | Mad Go-Ne | Mad Saturn | Mighty Gross | Demon Star | Freeze Killer | Alien Emerald II | Antron | Valentine | DumpKong | Wutan | Ghost King Jaigras | Ghost Demon Star | Ghost Antron | Ghost Dokuros King | TerroKing | Stone King | Chameleon King | Gaiagnes | Nonbirigon | Jumkiller | Airdriller | Imitation Jumborg Ace | Killer α | Killer β | Arumazigon | Satan Go-Ne | ButterFly King | Gold Dragon | Orolonger | Electric Bird | Kendaurusu | DeathMoon | Skeleton | Space Witch Barabas | OnestoKing | Jumkiller Jr. | MirrorKing | King Beetle | Remodled Satan Go-Ne | Demon Go-Ne | Alien Emerald III
Jumborg Ace & Giant Demon Go-Ne | Anti Go-Ne | Mad Go-Ne | Alien Gross | Jum Killer Jr. | Killer α | Gaiagnes | King Jaigras| Rubangar King | Chitanga | Giant Robot Zero | DeathKong King | Mons Robo | Glass King | King Ginger | Flight King | Dokuros King | Golden Arm | Dead Fire | Mighty Gross | Demon Star | Freeze Killer | Antron | Valentine | Dump Kong