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

"Secret Power, Zenkaiser! (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 Zenkaiser! (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

Kaito Goshikida (五色田 介人 Goshikida Kaito) is Zenkaizer (ゼンカイザー Zenkaizā), the White Ranger and leader of the Zenkaigers in Kikai Sentai Zenkaiger. He is one of the first two Zenkaigers to be awakened, the first human member of the team, and the only human part of the core team.

Character History

Meeting the Kikainoids and Becoming the Zenkaigers

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

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


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. He is also not one for foresight, as seen when attempting to bungee jump from the Tokyo Skytree with unlicensed equipment or reach Tojitendo Palace by jumping off his friends' backs.

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 being overpowered. When he was handed the Geartlinger and Sentai Gears, Kaito declared his desire of protecting the world with no hesitation.

Despite his own eccentricities, he exhibits great friendliness and level-headedness. 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.

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 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. Kaito is also very creative, using samba carnival feathers to tickle and incapacitate brainwashed civilians so as not to harm them. This trait makes him appear as hilarious to Zocks.




"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 counter Stacaesar's Dark Sentai Gear summons.



Appearances: Zenkaiger Episodes 1-

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.

Appearances: Zenkaiger Episodes 19, 21-24, 26-31, 33-38

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

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![5]"
―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.


This Form is exclusive to Kamen Rider Saber + Kikai Sentai Zenkaiger: Superhero SenkiIcon-crosswiki.png.


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.

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).
  • 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 ().
    • Also 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). (It is more visible when reading Japanese vertically).


  • 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.
  • The third episode of the series reveals that his astrological sign is Sagittarius.
  • With the exception of his Super Zenkaizer form, Kaito is the only Zenkaiger whose ranger suit was not based on a series adapted into a Power Rangers series.



Icon-zenkaiger.png Kikai Sentai Zenkaiger
Main: Kaito Goshikida - Juran - Gaon - Magine - Vroon - Zocks Goldtsuiker
Special-Exclusive: Zenkai Red
Transformation Devices
Transformation Gun Geartlinger (Geartozinger) - World Thief Transformation Gun Geardalinger
Sentai Gears-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) - Black JuranTyranno - Black GaonLion - Zenryoku Eagle
Giant Robos
Zenkai Gattai ZenkaiOh (JuraGaon - VrooMagine - JuraMagine - VrooGaon - SuperJuran - SuperVroon) - Kaizoku Gattai TwokaiOh (TwokaiOh Ricky - TwokaiOh Cutanner - Super TwokaiOh) - Cho Zenkai Gattaiju ZenKaijuOh (ZenKaijuDrill) - Battle Caesar Robo - ZenkaiOh Black JuraGaon - Zenryoku ZenkaiOh
Secchan - Mitsuko Goshikida - Yatsude Goshikida - Flint Goldtsuiker - TwokaiRicky - TwokaiCutanner
Legendary Sentai Rangers: Tsuyoshi Kaijo - Sokichi Banba - Tsuruhime - Doggie Kruger - Chiaki Tani - Raptor 283 - Shou Ronpo - Shiguru Oshikiri
Kikaitopia Dynasty Tojitendo
Leader: Great King Boccowaus
Generals: Mobile Commander Barashitara - Mechanic Officer Ijirude - Gege - Stacy - Hakaizer
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 - Persimmon World - Milk World - Inverted World - School World - Halloween World - Diamond World - Surprise Box World - Daikon World - Rider World - Bonn World - Shougatsu World - Match World - Traffic Light 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 Bonn World
Fake Zenkaigers: Fake Kaito - Fake Zocks
Grunts: Kudakks - Kudaiters - Kudaitests (New Kudaitests)
White Rangers

Secondary Rangers
RadiettaShadow White SwanCopyWhiteShade GaoWhiteFurabijo

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