|"Dash Dynamic!! Go-On Black!"
|―Go-On Black's roll call
Gunpei Ishihara (石原 軍平 Ishihara Gunpei) is Go-On Black (ゴーオンブラック Gōon Burakku) of the Go-Ongers. Nicknamed the "Chaser," he is a former police officer with excellent marksmanship and a passion for justice who sees the Go-Ongers de-transform.
His code name as a police officer was "Handsome Detective," and he passed himself off as such until his former partner revealed that Gunpei had never been a detective. He decides he wants to help and quits the police force (because the police had considered the Gaiark out of their jurisdiction) and tells the Go-onger this but is refused. Gunpei decided that the police had lost their sense of justice. TV STORY-GP 28: Partner Gunpei He then decides the Go-Ongers are unfit to be heroes and kidnaps BOMPER while stealing the Engines. BOMPER explains to him how the three were chosen and eventually decides to help the Go-Ongers by returning the Engine Casts to them the moment they need it most. Bomper decides to make him the fifth Go-Onger, Go-OnBlack, alongside Hanto Jou who becomes the fourth Go-Onger, Go-On Green. TV STORY-GP 02: Reckless Guys Gunpei initially belittles Sosuke Esumi, Renn Kousaka, and Saki Rouyama for being "just" kids and claims that he is "a man more qualified to be a Go-onger." However, he begins to bond with the team over time. Gunpei does not like sweets, but after he tasted a special cake Saki Rouyama had made, he found it delicious and eagerly accepted a slice.
Encountering the Gekiranger, the Go-Ongers lose the Engine Souls to the Gaiark and Meka. With Ran Uzaki and Ken Hisatsu's help, Gunpei and Saki manage to gain Geki. With Engine-Ken, a new type of Geki fighting fist, Gunpei was able to access his beast spirit (which turned out to be Gunpherd). With this he performs Ganga Ganga Dan, where Gunpherd, apart of his Engine Soul, attacks, as a manifestation of will. TV STORY-Engine Sentai Go-Onger vs. Gekiranger
After the final battle, Gunpei returns to the police force and finally becomes a detective. TV STORY-GP Final: Road of Justice
After transforming into Go-on Black, Gunpei says, "Dash Dynamic!! Go-on Black" (ダッシュ豪快！！ゴーオンブラック Dasshu Gōkai!! Gōon Burakku). With the Cowl Laser (カウルレーザー Kauru Rēzā) he can perform the Laser High-beam (レーザーハイビーム Rēzā Haibīmu).
Shinkenger vs. Go-Onger
After a difficult fight against Pollution President Batcheed, Gunpei and Renn were transported to the Samurai World where they encountered Chiaki Tani and Kotoha Hanaori of the Shinkengers. TV STORY-Samurai Sentai Shinkenger vs. Go-Onger: GinmakuBang!!
A few years later, Gunpei fought alongside not only his own team, but every single Sentai ranger in existence, against the Empire of Zangyack when it attacked the Earth in the Great Legend War. After fighting against hundreds of Gormin and their Zgormin commanders. AkaRenger noticed the fleet moving towards them, he gathered all the Rangers together and gave them the order to sacrifice their powers to wipe out the first invasion's armada. TV STORY-Ep. 1: The Space Pirates Appear TV STORY-Gokaiger Goseiger Super Sentai 199 Hero Great Battle
Farewell Space Pirates
After the defeat of Ackdos Gill, the Gokaiger returned all the Ranger Keys to the former Sentai heroes. Gunpei and his team have their powers again. TV STORY-Final Ep.: Farewell Space Pirates
Super Hero Taisen
Gunpei, alongside his team (the Go-On Wings were absent), among the majority of the Super Sentai heroes, was caught up in the "Super Hero Taisen" incident which eventually resulted in the Super Sentai teams and Kamen Riders joining forces to defeat both Dai-Zangyack and Dai-Shocker. TV STORY-Kamen Rider × Super Sentai: Super Hero Taisen
Zyuohger vs. Ninninger
Go-On Black appeared with his team among the first 38 Super Sentai whom collectively empowered Wild Tousai Shuriken King in its fight against the titanic Gillmarda, granting the Ninningers and Zyuohgers the power to perform the Zyuoh Ninnin Super Sentai Burst which destroyed Gillmarda with the combined power of all 40 Super Sentai. TV STORY-Doubutsu Sentai Zyuohger vs. Ninninger: Message from the Future from Super Sentai
Super Sentai Strongest Battle
Gunpei joined the Super Sentai Strongest Battle as a member of Police Team. It’s unknown whether he participated in any of the matches, but his team lost the competition either in the first round against the Water Warrior Team offscreen or won against them and lost in the second round against Super Strong Team offscreen.
Video game appearances
Super Sentai Battle: Ranger Cross
Go-On Black appears with his team in Super Sentai Battle: Ranger Cross.
- Gunpei Ishihara/Go-On Black: to be added
Super Sentai Battle Base
Go-On Black is among the vast pantheon of Rangers which are available in the mobile game Super Sentai Battle Base.
Super Sentai Legend Wars
Go-On Black appears with his team among all Sentai in the mobile game Super Sentai Legend Wars.
Go-Onger as seen in Super Sentai Legend Wars
Transformation and Roll Call
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The Go-On Black Ranger Key (ゴーオンブラックレンジャーキー Gōon Burakku Renjā Kī) is Gunpei Ishihara's personal Ranger Key and what became of his powers after he along with the rest of the 34 Super Sentai sacrificed their powers to end the Great Legend War.
This key along with the majority of the Ranger Keys were collected by the Red Pirates and later used by the Gokaigers. The Go-On Black Ranger Key was mainly used by Ahim de Famille (Gokai Pink), who used it to fight as Go-On Black.
After Zangyack were finally defeated, the Gokaigers gave the Ranger Keys back to their rightful owners. It is presumed that Gunpei received his key and became Go-On Black once more.
A female version of Go-On Black as seen in Gokaiger.
Behind the scenes
Gunpei Ishihara is portrayed by Kenji Ebisawa (海老澤 健次 Ebisawa Kenji).
As Go-On Black, his suit actor was Yasuhiko Imai (今井 康彦 Imai Yasuhiko) and Riichi Seike (清家 利一 Seike Riichi). In Engine Sentai Go-Onger: 10 Years Grand Prix, Yasuhiko Imai reprised his role as Go-On Black.
In the video game Super Sentai Battle: Ranger Cross, Go-On Black was voiced by Toshizo Miyasaka (宮坂 俊蔵 Miyasaka Toshizo), who also filled in for Shinken Blue.
In the Korean dub of Go-Onger entitled Power Rangers Engine Force, which aired in South Korea, Gunpei is known as Alex, while his Ranger designation is Engine Black.
- Though Gunpei is usually portrayed to be the oldest member of Go-Ongers, his actor, Kenji Ebisawa (who was 21 at the time of the series started), is actually younger than Shinwa Kataoka (22) and Hidenori Tokuyama (26), the actors who play Renn and Hiroto respectively and slightly younger than Yasuhisa Furuhara who play Sosuke for a few months.
- Gunpei's actor Kenji Ebisawa would later go on to play Shiro Mifune in Zyuden Sentai Kyoryuger