Ultraman Wiki

Kingstron (キングストロン Kingusutoron) was a Kaiju who appeared in the TV series, Return of Ultraman. Originally, it was Kupukupu (クプクプ) before mutating into Kingstron. He first appeared in episode 24.


  • Kingstron: Apartment Monster (マンション怪獣 Manshon Kaiju lit. Mansion Monster)
  • Kupukupu: Small Space Monster (宇宙小怪獣 Uchū ko Kaijū)


Return of Ultraman

Arriving in the meteor fragment, Kupukupu was a peaceful monster who meant no harm in his surroundings. However, Earth was still sensitive to alien sightings and Kupukupu was caged. MAT was quick on the case and despite the pleas of several children around the monster, Kupukupu was tragically destroyed by MAT out of paranoia.

After the destruction of Kupukupu when the tiny animal was blown up by MAT, a fragment of the creature was gathered by a small boy and it lived on and mutated into the monster Kingstron. Appearing as a giant mural of the monster on the boy's wall, Kingstron first made his appearance by destroying the room of the boy's family's apartment. MAT returned to the scene and attacked the mural that was Kingstron. Provoked yet again, Kingstron emerged from the wall and attacked MAT himself by attacking the building everyone was inside of. Endangering the boy in his blind rage, Go transformed into Ultraman Jack to do battle with the monster. At first Jack had the upper hand due to Kingstron's size, but once Kingstron used his energy bolts, the tides shifted to the monster's favor. Jack was about to use his Ultra Bracelet until Kingstron knocked him over making the bracelet come off, so Jack tried to use his Spacium Beam, which didn't phase Kingstron. Jack endured the battle until he found an opening and used the Ultra Bracelet on the monster, reducing Kingstron into a skeleton and ending its life for good.


  • Suit actor: Toya Takanobu
  • Designer: Ken Kumagai
  • Kingstron's roar is a roar uttered by Godzilla in Godzilla Raids Again.
  • The Kupukupu-Kingstron change is similar to Gavadon as a child/children were behind making it.


  • Height: 35 cm
  • Weight: 23 kg
  • Origin: Space
Powers and Weapons
  • Adaptation: If anything comes into contact that affects him, Kupukupu can mutate into something that reflects what came into contact with him.

Kingstron render.png
  • Height: 30 m
  • Length: 60 m
  • Weight: 15,000 t
  • Origin: Shinshu Appartments
Powers and ​We​apons
  • Flames: Kingstron can emit a deadly stream of fire from his mouth.
  • Energy Bolts: When needed, Kingstron can launch a missile-strength bolt of energy from the spike on his back end.
  • Rotating Spikes: If Kingstron is flipped upside down, the spikes on his back can rotate to flip him right side up.
  • Thick Hide: Kingstron's hide is strong enough to withstand Ultraman Jack's Spacium Beam.

Other Media


Kingstron in Redman.

Kingstron reappears in the TV series Redman episodes 45 and 50.

In episode 45, Kingstron fights the opposing monster Zaurs at first, with him having the upper hand, until Redman shows up and breaks up the fight. Even though the two monsters decided to work together to defeat Redman, Kingstron was eventually killed by the Red Fall onto Zaurs with the other monster being killed afterwards.

Kingstron reappeared in episode 50, but never got the chance to fight Redman because he was defeated and killed by Stegon before the hero got the chance to do the job himself. Stegon would eventually lose to the hero himself.


  • Kingstron's original costume was used in this series.



Return of Ultraman Kaiju
Takkong | Zazahn | Arstron | Sadola | Detton | Kingsaurus III | Gudon | Twin Tail | Gorbagos | Ghostron | Dangar | Stegon | Mognezun | Shugaron | Seamons | Seagorath | Eledortus | Terochilus | Bemstar | Sartan | Magnedon | Beacon | Gokinezula | Zanika | Vacuumon | Kupukupu | Kingstron | Zagoras | Nokogilin | Gronken | Varricane | Yadokarin | Oxter | Plooma | Alien Zelan | King Maimai | Alien Mates | Muruchi | Leogon | Pris-Ma | Draculas | Re-Seagorath | Re-Bemstar | Black King | Alien Nackle | Alien Varduck | Alien Black | Snowgon | Alien Baltan Jr. | Builgamo | Alien Stora | Paragon | Alien Grotes | Kodaigon | Granadas | Alien Centaurus | Robonez | Alien Cygnus-61 | Alien Messie | Alien Zoole | Red Killer | Femigon | Yametaranese | Sasahiller | Alien Ateria | Alien Mysteler | King Bockle | Alien Bat | Zetton II
Redman Kaiju
Redman Darkron | Black King | Arstron | Garamon | Alien Icarus | Dorako | Peguila | Jirahs | Alien Baltan | Alien Goron | Gomora | Woo | Kanegon | Alien Mefilas | Sadola | Dangar | Ghostron | Gokinezula | Eleking | Telesdon | Nokogilin | King Maimai | Sartan | Bemstar | Beacon | Gronken | Zaurs | Kingstron | Stegon | Alien Mysteler | Zagoras | Kodaigon | Granadas | Plooma | Sasahiller | Alien Centaurus | Gudon | Red Killer | Draculas | Shugaron | Alien Bat | Zetton II
Unused Redman Kaiju Big Liger | Graygas | Sufinga