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Icon-zenkaiger.pngThis article is about a/an ranger in Kikai Sentai Zenkaiger.

"Secret Power! Zenkaizer! (秘密のパワー, ゼンカイザー! Himitsu no Pawā! Zenkaizā!)"
―Zenkaizer's Roll Call[src]

"Full Speed! Non-Stop!"
―Zenkaizer’s pre-battle catchphrase

"It's a full-power world! All okay!"
―Zenkaizer’s post-battle catchphrase

"Secret Power-Up! Super Zenkaizer! (秘密のパワーアップ, スーパーゼンカイザー! Himitsu no Pawā-Appu! Sūpā Zenkaizā!)"
―Super Zenkaizer's Roll Call

"Food Waste Power! Zenkaizer!"
―Zenkaizer’s Roll Call in episode 6

"Unrequited Love Power! Zenkaizer!"
―Zenkaizer’s Roll Call in episode 18

"Tennis Power! Zenkaizer!"
―Zenkaizer’s Roll Call in episode 29

"Ramen Power! Zenkaizer!"
―Zenkaizer's Roll Call in episode 41

"Secret Glitter! Kirameki Zenkaizer! (秘密のキラメキ, キラメキゼンカイザー! Himitsu no Kirameki! Kirameki Zenkaizā!)"
―Kirameki Zenkaizer's Roll Call

Kaito Goshikida (五色田 介人 Goshikida Kaito) is the main protagonist of Kikai Sentai Zenkaiger. He is Zenkaizer (ゼンカイザー Zenkaizā), the White Ranger and leader of the Zenkaigers in Kikai Sentai Zenkaiger.

Kaito is 20 years old at the beginning of Zenkaiger. His birthdate is December 12, 2000.


Early Life

Kaito Goshikida was born to the couple, Isao and Mitsuko Goshikida. His parents created Secchan as his robotic companion when he was a young kid. Soon after the creation of Secchan, his parents went missing during their research involving parallel worlds. Since then, he has been living with his grandmother Yatsude.


In 2021, after Kaito's world merges with Kikaitopia, he along with the other humans welcome the Kikainoids with open arms. A month later, when the Tojitendo appear to subjugate their world, he is one of the only people to stand up to them.

After he accidentally activates Secchan, who leads him to his parents' secret lab, he gets his Zenkaiger equipment. He goes to fight the Tojitendo and meets Juran along the way. Then the two of transform into Zenkaigers and form their team, Kikai Sentai Zenkaiger to fight off the Tojitendo, and save their world.Tvicon.png TV STORY-No. 1-kai! The World of Kikai is Kikikaikai!

Tvicon.png TV STORY-No. 2-kai! The Gao Beast is Troublesome!

Tvicon.png TV STORY-No. 3-kai! A Serious Witch!

Tvicon.png TV STORY-No. 4-kai! It's Huge and Noisy!

In Other Media

The High School Heroes

Kamen Rider Saber and Zenkaizer in The High School Heroes.jpg

At the ending dance for one episode, a transformed Zenkaizer and a transformed Kamen Rider Saber appear, and join the others to participate in the dance.


Kaito wants to be the number one at everything. He is usually easygoing, but when his interest is triggered, he becomes hot-headed and excited. His ideas are very wacky but creative, as seen when attempting to bungee jump from the Tokyo Sky Tree with unlicensed equipment or whenever he makes a plan against the attacking World at the time.

He is a brave and daring man, as he did not hesitate to step in and oppose the evil invaders who were threatening his world, even when unarmed, outnumbered, and overpowered. When he was handed the Geartlinger and Sentai Gears, Kaito declared his desire of protecting the world with no hesitation. He is also very moral, looking down on cruel behaviors with good intentions, even against a World.

Despite his own eccentricities, he exhibits great friendliness, level-headedness, and sense of sympathy. He welcomed the quirks of his friends with open arms even before they became the Zenkaigers, and opted to look at the good one does before the bad. During the initial invasion of the Tojitendo, he did not discriminate against Juran due to just being a Kikainoid, but instead, he focused on the good he did instead.

In addition to that, Kaito had demonstrated that he can be a very perceptive person whenever the situation requires him to do so. For example, when Stacy (Actually Gege who is secretly controlling Stacy's body) had showed up and announced his intention to destroy the Tojitendo as well as join him and his team, Kaito had correctly denounced "Stacy" as an impostor due to Kaito himself being able to identify several key personality traits which had been frequently displayed by the "Real" Stacy during Kaito's previous encounters with Stacy that not even Gege himself was able to imitate even though Gege had access to Stacy's memories which would have allowed him to easily fool Kaito and his friends.

Having lost his parents for about ten years, Kaito longs to figure out what happened to them. When he gets an idea of what had happened to them he becomes more hot-headed than usual, rushing into combat and ignoring vulnerable civilians. While he reconciles with the need to help others he still prioritizes his parents, attempting to figure out ways to infiltrate the Tojitendo Palace, the place they were last rumored to be in.

Kaito's eccentric behaviors make him interesting to Zocks.

Kaito also has an optimistic opinion on fortunetelling, which he considers not as a foolproof instruction, but as a hopeful motivator in the times of hardship.



Zenkaizer's insert theme is Hajimete Ni BANZAI!.


"Yon-Juu-Go Bang! Ba-Bang! Ba-Bang! Ba-Bang! Ba-Bang! Babababang! Zenkaizer!"
―Transformation announcement[src]
  • Height: 190 cm[1]
  • Weight: 90 kg[1]
  • Speed: 100 km/h[1]
  • Power: 1500 hp[1]

As with all of the Zenkaigers, Zenkaizer exceeds in gunmanship, though due to lacking a personal weapon, he also specializes in freestyle and physical hand-to-hand combat. His sole access to the Sentai Gears adds to his and the Zenkaiger's abilities. Zenkaizer would later gain the Zenryoku Zenkai Cannon, allowing him to summon Sentai Warriors for the situation at hand.


Appearances: Zenkaiger Episodes 1-20, Saber + Zenkaiger: Superhero SenkiIcon-crosswiki.png, 21-49, Zenkaiger G-Rosso stage show, Zenkaiger vs. Kiramager vs. Senpaiger

Transformation and Roll Call

Super Zenkaizer

"Super! Ba-Bang! Ba-Bang! Ba-Bang! Ba-Bang! Babababang! Chou Zenkai!"
―Transformation announcement[src]
  • Height: 210 cm[2]
  • Weight: 410 kg[2]
  • Speed: 120 km/h[2]
  • Power: 20,000,000 hp[2]

Zenkaizer can use the ZenKaijuu Gear to transform into Super Zenkaizer (スーパーゼンカイザー Sūpā Zenkaizā)[3].

In this form Zenkaizer gains bulky armor reminiscent of Dragon Caesar, increasing his strength and durability, along with being granted the drill-like Zenkai Tenlance to fight. Despite the increased body mass, the armor does not hinder Zenkaizer's mobility in any form, and he remains as agile as he did without it. Much like the Kikainoid Zenkaigers, Super Zenkaizer can grow to a giant size as Giant Super Zenkaizer, though in his case his height matches both ZenkaiOh and TwokaiOh. As Giant Super Zenkaizer, Kaito can combine into ZenKaijuOh with Zocks as Super Twokaizer SD.

  • Super Zenkai Super Buster (超ゼンカイスーパーバスター Chō Zenkai Sūpā Basutā): Super Zenkaizer charges the Geartlinger with green energy from the Zenkaiju Gear before pulling the trigger and firing at a falling Zenkai Tenlance, charging it into a high-speed missile that bores through the enemy before their bodies explode.
  • Super Zenkai Super Kick: Super Zenkaiger toss the Zenkai Tenlance skywards before jumping up after it. Once pointed in the right direction, Super Zenkaizer then performs a flying drop kick into the weapon’s handle, propelling him and the Zenkai Tenlance through the enemy.

Appearances: Zenkaiger Episodes 19, 21-24, 26-31, 33-41, 45-46, 48, Zenkaiger G-Rosso stage show

Super Zenkaizer's insert theme is POWER UP! Super Zenkaizer.

Transformation and Roll Call

Giant Super Zenkaizer can assume the form of the ZenKaijuDrill, a large flying vehicle with a drill in the front. Simply charging at the enemy as the ZenKaiju Drill can finish off an opponent.

Appearances: Zenkaiger Episode 22

Stacaesar Kyoka

Stacaesar Kyoka (With Chest Cannon)

"Fe-ban! Stacaesar!"
―Transformation announcement[src]
  • Height: 180 cm [5]
  • Weight: 120 kg
  • Speed: 80 km/h
  • Power: 1550 hp

Stacaesar Kyoka (ステイシーザー (強化) Suteishīzā Kyōka) is the upgraded form of Stacaesar. In this form, he is able to summon past Sentai Rangers in their power-up forms, and is equipped with various additional pieces of arsenal through Ijirude's modifications, which vastly improve and augment his combat abilities.

Inhabiting Stacy's body due to actions of Inverted World, Kaito Goshikida transformed into Staceaser Kyoka to join the fight.

  • Geartozinger - Stacaesar's transformation device and sidearm.
  • Dark Sentai Gears - The evil counterparts of the Sentai Gears. With his Dark Sentai Gears, Stacy summons manifestations of past Sentai teams and/or Robos to fight against the Zenkaigers.
  • Shield - Stacaeser's upgrade includes a red shield that becomes one of his primary weapons.
  • Caesar Ankoku Ryuseigun (シーザー暗黒流醒群 Shīzā Ankoku Ryūseigun, lit. Caesar Dark Meteor Shower) - A wrist-mounted rocket launcher on Staceaser's right arm. It could hold up to 6 rockets at a time for simultaneous fire, and after detonation more missiles are quickly prepared for launch. To fire the Ankoku Ryuseigun, Stacesar was required to unequip his shield. If the missiles did not detonate, they did not regenerate.
  • Caesar Jaou Houkougeki (シーザー邪王砲皇撃 Shīzā Jaou Houkougeki, lit. Caesar Dark Emperor Cannon Blast) - A cannon deployed from the gear symbol on Stacaeser's chest that could charge and fire powerful blasts of energy when in use.
Appearances: Zenkaiger Episodes 32

Saber Super Hero Senki

"Rekka Battou! Donna toki mo taisetsu na mono o mamoru tame seigi ga tsumugu shōri no rekishi! Super Hero Senki! Jidai ga nozomu kagiri hero wa kanarazu arawareru![6]"
―Transformation announcement[src]
  • Height:
  • Weight:
  • Speed:
  • Power:

Zenkaizer can merge with Kamen Rider SaberIcon-crosswiki.png to become Super Hero Senki (スーパーヒーロー戦記 Supāhīrō Senki).

Zenkaizer transforms into the Super Hero Senki Wonder Ride BookIcon-crosswiki.png, which is used by Kamen Rider Saber to assume the Zenkaizer-based form. While Touma Kamiyama primarily takes on the form, Kaito's consiousness can project itself to assume a finisher with Saber.

Appearances: Saber + Zenkaiger: Superhero SenkiIcon-crosswiki.png.

Kirameki Zenkaizer

"Super! Ba-Bang! Ba-Bang! Ba-Bang! Ba-Bang! Babababang! Chou Zenkai!"
―Transformation announcement[src]

Kirameki Zenkaizer is a form Zenkaizer takes on when using the Kirameki Zenkaiju Gear.[7][8]


This form is exclusive to Kikai Sentai Zenkaiger vs. Kiramager vs. Senpaiger


Legend Sentai Devices

Zenkaizer Ranger Key

The Zenkaizer Ranger Key (ゼンカイザーレンジャーキー Zenkaizā Renjā Kī) is Kaito's personal Ranger Key released as part of the "Ranger Key Memorial Edition - After Gokai Hero Set". It is unknown if it will appear in a future crossover. Of course as with all Ranger Keys, should it exist, it would be able to transform one, i.e. one of the Gokaigers, into Zenkaizer.

Zenkaiger Avataro Gear

"Yo! Don! Don! Don! Donburako! Zenkaizer!"
―Equipping announcement while spinning the shuriken[src]

"Babang! Babang! Babang! Babang! Ba-Ba-Ba-Bang! Zenkaiger! Hey yo! Himitsu no Power!"
―Activation announcement[src]

"Parley Time! (air horns) Zenkaizer!"
―Finisher activation announcement[src]

"Dai Zenkai![9]"
Zanglassword finisher announcement[src]

  • Zenkaiger Avataro Gear (ゼンカイジャーアバタロウギア Zenkaijā Abatarō Gia) - Allows a Donbrother to assume the form of Zenkaizer.[10]


Behind the Scenes


  • Kaito Goshikida is portrayed by Kiita Komagine (駒木根 葵汰 Komagine Kiita). As a child, he is portrayed by Yumeki Uenoyama (上野山 夢輝 Uenoyama Yumeki), with Koh Enomoto (榎本晄 Enomoto Kō) substituting for Uenoyama in Episode 40.
  • As Zenkaizer, his suit actor is Masashi Takada (高田 将司 Takada Masashi), who previously served as suit actor for Kiramai Silver.


Concept Art


  • Kaito's surname, Goshikida (五色田 Goshikida), is composed of the kanji for five () and color ().
    • It sounds like "I'm the 5 colors" (五色だ Goshiki da).
  • 田 and 介 are used as radicals to form the kanji for "world" ( Kai), making his full name a play on words meaning "Five-Colored Worlder" (五色界人).


  • Zenkaizer is:
    • The first non-Red Ranger to appear in a Hand-Off.
    • The last core Zenkaiger to gain a personal weapon, only able to rely on his Geartlinger until he retrieved the Zenryoku Zenkai Cannon from Hakaizer.
    • The first Sentai main protagonist to not be red, though his clothes and suit design feature it as a prominent secondary color.
  • Zenkaizer's helmet features spots on his visor, which calls back to the early days of Sentai where helmet visors had to be perforated in order for the suit actors to see until the use of transparent materials became commonplace.
  • Zenkaiger episode 3 reveals that his astrological sign is Sagittarius while episode 39 reveals that his birthday is on December 12.



Icon-zenkaiger.png Kikai Sentai Zenkaiger
Kaito Goshikida - Juran - Gaon - Magine - Vroon - Zocks Goldtsuiker - Stacy
Special-Exclusive: Zenkai Red - Flint Goldtsuiker
Transformation Devices
Transformation Gun Geartlinger (Geartozinger) - World Thief Transformation Gun Geardalinger
Sentai Gear-related
Sentai Gears (Dark Sentai Gears) - Zenkai Buckle (Twokai Buckle)
Juran Sword and Juran Shield - Gaon Claw - Magine Stick - Vroon Picker - Zenkai Tenlance - Zenryoku Zenkai Cannon
Mecha and Robos
JuranTyranno - GaonLion - MagineDragon - VroonDump - Battleship CrocoDaiOh (CrossKaiOh - CrawlingOh) - Zenryoku Eagle
Superbike Enya Rideon
Giant Robos
Zenkai Gattai ZenkaiOh (JuraGaon - VrooMagine - JuraMagine - VrooGaon - SuperJuran - SuperVroon - DonZenkaiOh) - Kaizoku Gattai TwokaiOh (TwokaiOh Ricky - TwokaiOh Cutanner - Super TwokaiOh - CrocoDai Bazooka) - Cho Zenkai Gattaiju ZenKaijuOh (ZenKaijuDrill) - Zenryoku ZenkaiOh
Secchan - Yatsude Goshikida - Isao Goshikida - Mitsuko Goshikida - Flint Goldtsuiker - TwokaiRicky - TwokaiCutanner
Legendary Sentai Rangers: Tsuyoshi Kaijo - Sokichi Banba - Tsuruhime - Doggie Kruger - Chiaki Tani - Captain Marvelous - Kairi Yano - Raptor 283 - Shou Ronpo - Juru Atsuta - Tametomo Imizu - Sena Hayami - Shiguru Oshikiri - Sayo Oharu - Takamichi Crystalia
Others: Taro Momoi
Kikaitopia Dynasty Tojitendo
Leader: Great King Boccowaus - King Potdeus
Generals: Mobile Commander Barashitara - Mechanic Officer Ijirude - Gege - Stacy - Hakaizer - Dr. Iokal
Worlds: Mushroom World - Ice World (Presski World) - Boxing World (Kickboxing World) - Sushi World - Garbage World (Recycle World) - Door World - Super Warumono World (Normal Warumono World) - Kashiwa Mochi World (Sakura Mochi World) - Noon World (Sun World, Sundial World) - Onigokko World - Snail World - Retro World - Magnet World - Invisible World (Thief World) - Love World - Kabutomushi World - Hikoboshi World (Orihime World) - Copy World - Bullfighting World - Vacances World - Manga World - Tennis World - Dried Persimmon World - Milk World - Inverted World - School World - Halloween World - Diamond World - Surprise Box World - Daikon World - Rider World - Bon World - Shougatsu World - Noodle World - Kotatsu World - Headwind World - SD World - Omikuji World - Carrot World - Sapphire World - Bat World - Beef Rib World - Match World - Traffic Light World - Theater World
Great Worlds: Great Mushroom World - Great Ice World (Great Presski World) - Great Boxing World (Great Kickboxing World) - Great Sushi World - Great Garbage World (Great Recycle World) - Great Door World - Great Kashiwa Mochi World - Great Noon World - Great Onigokko World - Great Snail World - Great Retro World - Great Magnet World - Great Invisible World (Great Thief World) - Great Love World - Great Kabutomushi World - Great Hikoboshi World - Great Copy World - Great Bullfighting World - Great Vacances World - Great Manga World - Great Tennis World - Great Persimmon World - Great Milk World - Great Inverted World - Great School World - Great Halloween World - Great Diamond World - Great Surprise Box World - Great Daikon World - Great Bon World - Great Shougatsu World - Great Noodle World - Great Kotatsu World - Great Headwind World - Great SD World - Great Omikuji World - Great Carrot World - Great Sapphire World - Great Bat World - Great Beef Rib World
Fake Zenkaigers: Fake Kaito - Fake Zocks
Grunts: Kudakks - Kudaiters - Kudaitests (New Kudaitests)
Mecha: Battle Caesar Robo (Battle Caesar Robo II - Battle Caesar Robo III) - ZenkaiOh Black JuraGaon (Black JuranTyranno - Black GaonLion) - HaKaijuOh - Ijirudestroyer IV
Others: God
White Rangers
Sokichi BanbaSayaka NagisaKaori RokumeikanKouTsuruhimeSae TaigaMikoto NakadaiTekkan AiraMiyuki OzuKen HisatsuFuuka IgasakiAmuLuckyKaito Goshikida

Secondary Rangers
RadiettaShadow White SwanCopyWhiteShade GaoWhiteFurabijo

Power Sets
Big OneChangeMermaidWhite SwanKibaRangerNinjaWhiteWhite Racer (secondary)GaoWhiteAbareKillerDekaBreakMagiMotherGekiChopperShiroNingerZyuoh TigerShishi Red OrionZenkaizer