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"To think to overwhelm him with sheer mass, I'm impressed!"
"I know it's cheap to scale up, but our guest is being cheap too. You're up, Gridman. How will you fight a Kaiju of this size?

―Alexis and Akane

Go'yavec (ゴーヤベック Gōyabekku)[1] is a Kaiju that debuted in SSSS.GRIDMAN. It was made to overwhelm Gridman with its massive size.

Subtitle: Monster of Many Difficulties (多事多難怪獣 Tajitanan Kaijū)



Akane was getting fed up of Gridman defeating all her kaiju, so she decided to try creating one that would dominate him using great size. Go'yavec was brought into action by Alexis when Akane called him during her rafting trip, having confirmed her suspicions of Yuta Hibiki transforming into Gridman. Go'yavec then caused aimless destruction and started a forest fire, endangering the Tsutsujidai students and staff. This went on for a while, disappointing Akane who expected Gridman to show up sooner. After Rikka Takarada called her mother's shop, the Neon Genesis Junior High Students bought Junk using whatever money they could fork up and brought it all the way to near the forest area, allowing Yuta to Access Flash and fight Go'yavec. Buster Borr joined the battle was well, providing support to Gridman against Go'yavec and Anti, who had joined the battle. Combining into Buster Gridman, the Twin Buster Grid Beam was used to destroy Go'yavec, whose remains crumbled over Anti. Provocation

Go'yavec was the last of the Kaiju army summoned by Alexis, and it almost defeated Gridknight. Luckily, Full Powered Gridman arrived in the nick of time to protect Gridknight and the gigiantic monster was finished off the same was as before - with the Twin Buster Grid Beam. Decisive Battle


  • Designer: Osamu Yamaguchi
  • Unlike the rest of the Kaiju so far, Go'yavec does not have a 3D animation model, but is rather animated as if it were a part of the scenery and background instead. As a result, its movements were stiff and limited.
  • Go'yavec's roar is a distortion of Reina Ueda saying Kaeritai! (帰りたいです!lit. "I wanna go home!"), reflecting Akane's disdain for the rafting trip.


  • Height: 399 m
  • Weight: 5,600,000 t
Powers and Weapons
  • Fireballs: Go'yavec can erupt fireballs of great power from its back.
  • Claws: Each of its claws is very large and can be used to attack with.
  • Size: Go'yavec's main weapon is its gigantic mountain-sized body, which is too huge for Gridman to attack normally. The monster is so large that Gridman is barely the size of its nail.
  • Durability: Its entire body is covered in a rock-like outer layer that protects it from damage, but is useless against heavy firepower.



Gridman Kaiju
Gridman the Hyper Agent Kahn Digifer | Gilarus | Bamora | Volcadon | Stealgun | Bagira | Anosillus | Compoid Unison | Flamelar | Blizzalar | Shinobilar | Terragaia | Metallus | Magnegauss | Generadon | Mecha Gilarus | Revived Shinobilar | Mecha Bamora | Imitation Anosillus | Mummy | Mecha Bagira | Mecha Flamelar | Mecha Stealgun | Dazzlba | Neo Metallus | Mecha Generadon | Plandon | Venora | Boranga | Eyegangar | Kung Fu Shinobilar | Jubagon | Teleboze | Gyurunba | Chidogerah | Abumaru | Goromaking | Devil Phazer | Khan Giorgio | Skubone | Giant Kahn Digifer | Kahn Digifer's combatants (stage show)
Gridman the Hyper Agent: The Demon King's Counterattack Neo Kahn Digifer | Neo Metallus | Magma Giras | Glavas | Mad Texas | Gorgoberos | Devilight | Gilarus | Stealgun | Shinobilar | Geist Digifier
Gridman the Hyper Agent: boys invent great hero Gilarus | Magnegauss | Revived Shinobilar | Venora | Giant Kahn Digifer | Glavas | Magma Giras | Gorgoberos | Devilight
SSSS.GRIDMAN Venora | Alexis・Kerib | Ghoulghilas | Dévadadan | Anti | Gonglee | Go'yavec | Anosillus the 2nd | Diriver | Mecha Ghoulghilas | Bujack | Nanashi | Zegga | Repli-Compoid | Giant Alexis・Kerib | Anosillus
SSSS.GRIDMAN NOVELIZATIONS Black Akane | Gaiyaros | Scorban | Deiwardas
Diaclone VS. Gridman Giganter
SSSS.DYNAZENON Shalbandes | Greyjhom | Burnaddon | Didoras | Neophobia | Bullbind | Zaiohn | Goldburn | Gibzorg | Garnix | Gagula
Gridknight Fight Alexis・Kerib | Anti | Nanashi B