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Arstron info
Home world: Planet Earth (Various Universes)
First appearance: Return of Ultraman episode 1 "All Monsters Attack." (1971)
Latest appearance: Ultraman Saga
Height: 60 m
Weight: 25,000 t
Category: Kaiju
Affiliation: Ghostron (possible relative)
Babaloneon Empire
Ultraman Belial
Alien Bat
Roar(s): TBA

Arstron (アーストロン Āsutoron?), or Earthron, is a kaiju that first appeared in the TV series, Return of Ultraman, in episode 1.

Subtitle: Violent Monster (凶暴怪獣 Kyoubou Kaijū?)


Return of Ultraman


Earthtron in Return of Ultraman

Arstron first appeared mysteriously in a mountainous region without warning or origin, attacking a nearby village and setting fire to the homes with its heat ray. MAT arrived shortly after the monster arose, attacking the beast with their cannon fire but to no avail. Arstron continued destroying the village. Goh Hideki, the host of the newest Ultraman came to the scene, guided by Ultraman Jack's conscience came to the village to help some people who were trapped in the debris caused by Arstron's rampage, before unknowingly transforming into the new Ultraman Jack by sheer willpower. Jack quickly turned to face Arstron and the two fought, taking their battle from the ruined village to a nearby valley (presumably the same one Arstron emerged from). However, Jack's color timer was start to blink cause his strength to deplete and Arstron to gain an advantage, but Jack continued to fight back and eventually hit Arstron with a Specium Ray, causing Arstron to tumble back into a crater and explode into blue flames.


  • Arstron's roar is a modified roar of the Daiei monster, Gyaos, and some of his screams might be modified pig squeaks.
  • Arstron resembles Godzilla in design. This is possibly due to that fact that Arstron was designed by Nobuyuki, an art director who worked at Toho Co. Ltd and designed some of the Godzilla suits and in default, Gomess.
  • Arstron has a possible relative: Ghostron.
  • Arstron appears in the opening to the series, Ultraman Ace, as one of the many silhouettes of monsters.
  • Arstron reappears in a Televi-kun Magazine that features Ultraman X, where he is used to demonstrate the Ultra's power by being the victim of Xanadium Ray.
  • Arstron's Spark Doll can be seen in the second Ultraman Ginga Theater Special
  • This Episode was later featured in episode 30 of Ultraman Retsuden: All Monsters Attack! Birth of Jack!!


Earthtron Jonias

Arstron, as seen in The☆Ultraman

Arstron reappeared in The☆Ultraman, episode 27 .

The first monster in the Babaloneon Empire, Arstron emerged from the ground and almost engaged Ghostron in battle. As the Science Garrison watched on in awe, yet another beast, Gokinezula, joined the three in a titanic three-way battle royal. As the three monsters were locked in mortal combat, Aboras and Banila emerged as well and battled elsewhere on the island. With five monsters running wild, the Science Garrison began to blanket the entire island with bombs in hopes of killing them all off, however the Babaloneon Empire fought back as well, downing their jet in between Arstron and Ghostron. Arstron was quick to respond to the Science Garrison's presence and quickly destroyed what remained of their ship. The Science Garrison however was not without its own defenses and was able to destroy Arstron after firing at rocket at the monster.


  • Like the majority of returning monsters in the series, Arstron does not possess his original roar.

Ultraman Mebius

Earthtron mebius

Arstron, as seen in Ultraman Mebius.

Arstron reappeared in Ultraman Mebius episode 20 "Connecting Message".

In this series, Arstron's origin is again not stated, and his attack comes out of the blue like before, attacking GUYS's HQ at a test site. However this time his actions are being guided by a Cherubim, who is using diverted frequency waves (originally intended to control Manquette Monsters) and directing them at Arstron to control him (In a rather comical way.) Ultraman Mebius arrives to do battle against Arstron and has the upper hand until Cherubim arrives and the two monsters double-team him. Team GUYS learns of Cherubim's control over Arstron and destroys the frequency waves that are doing so, severing Cherubim's control. Once freed, Arstron attacks Cherubim when provoked by the alien monster, but both monsters are destroyed by Ultraman Mebius, who uses his Mebium Blade to cut Arstron's head off.

Ultra Galaxy Mega Monster Battle

Earthtron galaxy

Arstron, as seen in Ultra Galaxy

Arstron reappeared in episode 8 of the series Ultra Galaxy Mega Monster Battle.

In this series, Arstron appears again out of nowhere and attacks a Cherubim in the area (possibly reminiscing their relationship in the previous series.) It seems Cherubim has won as it hits Arstron with several fireballs causing Arstron to collapse, but Arstron feins his defeat, ambushing the other kaiju by tearing off his "ears" and killing it with his Magma Energy Beam. Shortly after his victory, Arstron is dragged underwater where he is forced to do battle against an Eleking, where he was not so lucky, being electrocuted to death by Eleking's tail.


  • Arstron appears again in the flashback of a little girl who witnesses him in battle against a Red King.
  • The Arstron suit from Ultraman Mebius was reused for Arstron's appearance in the series.
  • During the opening credits to the series, Arstron is seen battling Bemstar, even though neither monster fought or met each other in the series.
  • Arston's battles agianst Cherubim and Eleking were referenced by the Spark Dolls Troupe in New Ultraman Retsuden Episode 16

Ultra Galaxy Mega Monster Battle: Never Ending Odyssey

Earthtron galaxy NEO 2

Alien Zelan's Arstron.

Arstron returned in episode 3 of the sequel series Ultra Galaxy Mega Monster Battle: Never Ending Odyssey.

In this series, Arstron belonged to an Alien Zelan. Both he and his master were seen briefly in battle but were killed by their opponents: a Galberos who belonged to an Alien Nackle.


  • The Arstron suit from Ultraman Mebius was reused for Arstron's appearance in the series.
  • During the opening credits to the series, Arstron is seen battling Gomess, even though neither monster fought or met each other in the series. Ironically, both monsters are affiliated to Godzilla.

Mega Monster Battle: Ultra Galaxy Legend The Movie

Arstron reappeared in the movie Mega Monster Battle: Ultra Galaxy Legend The Movie as one of Ultraman Belial's 100 Monster Army. He was first seen reacting to the Plasma Spark as a spirit along with Roberuga Jr, Fire Golza, King Pandon, Alien Metron, and Gudon in a shot of the Monster graveyard. He teamed up with Zoa Muruchi, Telesdon, Alien Temperor, and Alien Hipporito to take on Gomora. When Reimon and Gomora went berserk due to Belial's actions, Arston was called back along with the other surving monsters to watch Gomora take on the Ultras. When Ultraman Zero arrived, Arston teamed up with the rest of the remaining monsters to take Zero down. He was the first monster to be killed by Ultraman Zero's Zero Sluggers followed by King Pandon, Verokron, Sadola, and Alien Hipporito.


The Arstron suit from Ultraman Mebius was reused for Arstron's appearance in the film.

Ultraman Saga


Astron vs Ultraman Dyna

Arstron reappeared in the movie Ultraman Saga.

Arstron (as well as Gomess (S) and Gubira) is one of the monsters who have been revived by Alien Bat to serve him.

Arstron appears in a alternate universe of Earth in Tokyo where it attacks Team U during their raid on an abandoned store for groceries. Despite Team U's efforts with their U Loaders, Arstron shrugs off their assaults and continues on his rampage. Shortly after Team U is beaten, Ultraman Dyna appears and quickly destroys Arstron, hurling him into the air (by spinning him around by his tail) and destroying him with the Solgent Ray.


  • The Arstron Suit from Ultraman Mebius was reused for Arstron's appearance in the film with a new head constructed.
  • In this film, Arstron's Magma Beam attack is stylized more as a short blast of lava fired from his mouth, rather than an actual beam.
  • According to several earlier released trailers of the film, Ultraman Dyna and Arstron's fight was to last longer (scenes in while Dyna is seen punching and kneeling Arstron in the face are present within these trailers,) but were later cut from the film for unknown reasons.
  • Arstron's death is very similar to that of Zetton II from the final episode of Return of Ultraman, the same episode that Alien Bat first appeared in.


Arstron data


  • Height: 60 m
  • Weight: 25,000 t
  • Origin: A Morning fog (Return of Ultraman, and both Ultra Galaxy series), near GUYS vs. Kaiju Institute Vicinity (Ultraman Mebius), Planet Boris (Ultra Galaxy), Monster Graveyard (Ultraman Saga)
  • Attack: 1000 (Galaxy), 900 (NEO)
  • Defense: 1100 (Galaxy), 1000 (NEO)
  • Speed: 600 (Galaxy), 15 (NEO)

Powers and Abilities

  • Magma Beam: From his maw, Arstron can fire a very powerful beam of magma, that is as hot as magma, from his mouth. This beam can be charged up for an even stronger shot that has enough firepower to be capable of completely destroying weaker adversarial monsters in one hit.
  • Thick Hide: Astron has an extremely thick hide, making it hard to damage him internally and externally.
  • Burrowing: Arstron can burrow at moderate speeds.

Joneus Arstron
Earthtron Jonias


Powers and Abilities

  • Energy Blasts: Joneus Astron can launch missile-strength blasts of magma energy from its mouth.
  • Burrowing: Joneus Arstron can burrow at moderate speeds.

Other Media



Arstron in Redman

Arstron reappeared in episodes 3, 4, 52, 55 and 56 of the series, Redman.

Episode 3

In episode 3, he appears on a hill where he kicks a fallen tree to trip Redman but he jumps over it. Arstron tries to get away, but Redman chased him up the hill to a large field to fight. After a bit of battling, Redman threw the Red Knife, killing Arstron in a small explosion.

Episode 4

In episode 4, Arstron was tricked by Redman's teleportation and was killed with his Red Chop.


  • Unlike the majority of monsters in the series, Arstron's suit was not re-used from the Return of Ultraman series. Instead, it was reused from the Arstron suit that was used during stage shows and attractions.
  • In this series, Arstron has a reused roar of the Toho monster Godzilla


Return of Ultraman

Ultraman Mebius

Ultra Galaxy Mega Monster Battle

Ultraman Saga

The Ultraman


Return of Ultraman Kaiju & Seijin
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 | Zagorath | 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 & Seijin

Darkron | Black King | Arstron | Garamon | Alien Icarus | Dorako | Peguila | Jirass | Alien Baltan | Alien Goron | Gomora | Woo | Kanegon | Alien Mefilas | Sadola | Dangar | Ghostron | Gokinezula | Eleking | Telesdon | Nokogilin | King Maimai | Satan | Bemstar | Beacon | Gronken | Zaurs | Kingstron | Stegon | Alien Mystellar | Zagoras | Kodaigon | Granadas | Plooma | Sasahiller | Alien Centaurus | Gudon | Red Killer | Draculas | Shugaron | Alien Bat | Zetton II


Big Liger | Gureigasu | Sufinga

The☆Ultraman Kaiju & Seijin
Seagra | Spiral | Wanigodon | Red Smogy | Tough Gillan | Tough Gillas | Tough Gillaco | Firebadon | Combugon | Robot No.101 | Alien Baltan IV | Mikonos | Dolfiego | Xalome | Hectore | Liquid Monster | Opt | Garadoras | Xyclon | Gellon | Gadon | Goglan | King Moa | Badan | Islanda | Gerada | Janyur | Bedoran | Bader Group | Bagon | Janyur III | Zaanmoth | Zanba | Dragodos | Death Balan | Gibaaroga | Red King | Aboras | Banila | Earthtron | Ghostron | Gokinezula | Alien Baladon | Dabaran | Jadan | Jagon | Skeldon | Garbados | Megasaura | Babilar | Gamiba | Imedo Being | Goadarion | Jinario | Groteng | Plazoon | Agujon | Deathpower | Zuma | Gurol | Darantulas | Alien Noa | Heller | Roygar | Panther | Heller Army | Gumons | Hell Cat | Orolan | Gilos | Gilo | Fake Ultraman Joneus | Hatari | Large Battleship | Dostony | Spader | Caperadon | Alien Scien | Golding | Gedon | Hella Umaya | Heller Fleet | Makdatar

Ultraman Mebius Kaiju & Seijin
Ultraman Mebius Dinozaur | Gudon | Birdon | Miclas | Cherubim | Dinozaur II | Sadola | Twin Tail | Bogar | Rimu Eleking | Alien Fanton | C-Pin 929 | Bogarmons | Dinozaur III | Windom | Dinozaur Reverse | Kodaigon | Mukadender | Insectus | Gromite | Zamsher | Alien Magma | Alien Valky | Saramandora | Bemstar | Daigarugu | Arstron | Cherubim II | Lesser Bogar | Chronorm | Alien Angel | Yapool | Fire Windom | Vakishim | Doragory | Verokron | Marquette Zetton | Ultraman Mebius (Marquette) | Nova | Maquette Nova | Inpelaizer | Roberuga | Alien Mates | Zoa Muruchi | Femigon | Alien Reflect | Alien Babarue | Angross | Alien Psychokino | Jasyuline | Arigera | Alien Serpent | Sorichra | Sorichran | Roberuga II | Hoe | Gomora | Mysterious Saucer fleet | Gadiba | Red King | Mebius Killer | Giant Yapool | Deathrem | Lunaticks | Grozam | Alien Mefilas | Gromite II | Mass Production Inpelaizer | Alien Empera
Ultraman Mebius and the Ultra Brothers U-Killersaurus | Yapool |Alien Temperor | Alien Zarab | Alien Guts | Alien Nackle | U-Killersaurus Neo
Ultraman Mebius Gaiden: Armored Darkness Saramandora | Mukadender | Roberuga | Cherubim | Armored Darkness
Superior Ultraman 8 Brothers

King Guesra | King Pandon | King Silvergon | King Goldras | Super Alien Hipporito | Giga Khimaira | Black Silhouette
Ultraman Mebius Gaiden: Ghost Rebirth Mechazam | Inpelaizer | Alien Mefilas | Grozam | Deathrem | Mebius Killer | EX Zetton | Ghost Reverse

Ultra Galaxy Kaiju & Seijin
Ultra Galaxy Mega Monster Battle Telesdon | Sadola | Red King | Rei's Gomora | Rei's Litra (S) | Juran | Golza | Gudon | Neronga | Bemstar | Fire Litra | Fire Golza | Gan Q | Banpira | Twin Tail | Frogos (B) | Bullton | Cherubim | Arstron | Eleking | Gromite | Angross | Arigera | Zoa Muruchi | Nova | Saramandora | Lunaticks | King Joe Black | Verokron | Doragory | Zetton | Reimon | EX Gomora
Never Ending Odyssey Alien Pitt | Reionyx Hunters | Gomess (S) | Magular | Rei's Gomora | Dorako | Eleking | Alien Hook | Rei's Litra (S) | Alien Guts | Alien Zelan | Arstron | Alien Nackle | Galberos | Illusion Zetton | Burst Mode Reimon | Reionic Burst Gomora | Doragory | Alien Metron | Bemstar | Alien Babarue | Antlar | Vakishim | Alien Keel | Tyrant | Fire Litra | Alien Zarab | Imitation Ultraman | Alien Mefilas | Armored Mefilas | Dada | Alien Temperor | Arigera | Armored Darkness | Miclas | Alien Zetton | Telesdon | King Joe Black | Cherubim | Red King | Alien Reflect | Birdon | King Joe Scarlet | Alien Reiblood | EX Gomora | EX Red King
Mega Monster Battle: Ultra Galaxy Legends THE MOVIE Bemular | Alien Zarab | Zaragas | Rei's Gomora | Dorako | Bemstar | Saramandora | Windom | Miclas | Agira | Pigmon | Rei's Litra (S) | Gomess (S) | Alien Baltan | Antlar | Red King | Magular | Telesdon | Dada | Alien Mefilas | Alien Zetton | Zetton | Eleking | Alien Metron | Nurse | Alien Shaplay | Alien Guts | Arstron | Sadola | Gudon | Twin Tail | Black King | Alien Nackle | Verokron | Vakishim | Doragory | Lunaticks | Birdon | Mukadender | Alien Temperor | Tyrant | Alien Valky | Alien Magma | Alien Pressure | Alien Babarue | Nova | Hoe | Fire Golza | Gan Q | Galberos | Frogos (B) | Banpira | Cherubim | Gromite | Zoa Muruchi | Alien Reflect | Angross | Jasyuline | Arigera | Roberuga II | King Joe Black | Super Alien Hipporito | King Silvergon | King Goldras | King Pandon | King Guesra | Beryudora
Ultra Galaxy Gaiden: Ultraman Zero vs. Darklops Zero Rei's Gomora | Litra | Darklops Zero | Mecha Gomora | Alien Salome | Robot Ultraseven | Robot Ultraman | Robot Ultraman Jack | Fake Ultraman Ace | Robot Zoffy
Ultraman Zero The Movie: Super Deciding Fight! The Belial Galactic Empire Iaron | Darkgone | Legionoids | Delusts | Brigantes | Two-Dimensional People | Darklops | Malebrandes | Arch Belial
Ultraman Zero Gaiden: Killer the Beatstar Beatstar | Rei's Gomora | Ace Killer | Inpelaizer | King Joe | Litra | Alien Bat
Ultraman Saga Hyper Zetton | Alien Bat | Sphire | Gubila | Gomess (S) | Astron | Legionoids | Chaos Header 0 | Lidorias | Bolgils | Mogrudon | Golmede | Mienin | Eligal

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