Great Teacher Onizuka (GTO) Wiki

Eikichi Onizuka (鬼塚 英吉 Onizuka Eikichi) is the main protagonist of the Great Teacher Onizuka (GTO) series. Together with his best friend, Ryuji Danma, they were once known as the Oni-Baku: Shonan's strongest fighting duo. He decided to become a teacher after helping a troubled JK for good.

DOB: August 3

In the original manga and anime, Onizuka is a 22-year-old bachelor and teacher at Holy Forest Academy. There, he is the homeroom teacher of the troublesome Class 3-4. He teaches social studies, but is renowned throughout the school for teaching life lessons to his students.


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Onizuka preparing to woo Nanako Mizuki into bed with him.

Onizuka is of average height, has brown eyes, blond hair (dyed), and pierced ears. Onizuka is a chain smoker, rarely seen without a cigarette in his mouth. Unlike other animes, where the character's outfit remains the same, Onizuka's outfit constantly changes. He's well known for having a wide variety of costumes.

Onizuka is very athletic: being able to bench press 150kg (approximately 330 lbs.). He is a second dan black belt and was a college karate champion. Also, he has stated a number of times that he follows a daily training routine, which includes 500 push ups, 1000 pull ups, and 2000 Hindu squats.

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Onizuka appears at the Mizuki household with a sledgehammer.

Onizuka's abnormal strength is displayed various times throughout the manga; his fearsome power is used to solve many of his problems as well as his students' problems. Onizuka also has an extremely durable body; he has survived multiple falls off of the school rooftops in order to save students and even another teacher. He is always seen traveling via his motorbike (a Kawasaki 750 Road Star Z2); remaining passionate for bikes since his experience as co-leader of the biker gang Oni-Baku.


Onizuka is a very presumptuous and vulgar guy that it often leads him into trouble. Although he is very hormonal when it comes to girls, he is still a virgin and seems to be unable to get a girlfriend. He likes sexy women to the point of even sexually tempting Nagisa Nagase (Ryuji Danma's girlfriend) without caring that his friend was right behind him. He is often referred to as a pervert and has a fetish with smelling young ladies fresh panties in their drawers. Onizuka is also unashamed of the state of untidiness of his home and the fact that many porn magazines lie around his house.

Onizuka's behavior is akin to that of a child. After finding out that Hajime Fukuroda has a secret longing for the academy's students, he made him into one of his pranks main targets; which consists of hitting him with water rockets.

Despite all this, Onizuka can be very serious when the moment asks for it. To solve problems, he will surely take the most weird and unexpected (and often the hardest) route, but also the most epic. Depending on your point of view, he could be considered a fool or a genius. He never stops surprising the people around him with his behavior, actions, and decisions, except for Ryuji, who has known him for a very long time. Despite this, the school's principal, Ryoko Sakurai, deeply trusts him.

As for being a teacher, Onizuka is very eccentric, be it his methods of teaching or the way he dresses.

Onizuka loves eating, in particular sushi. On one occasion, he purchased three orders of Otoro (fatty tuna) and even asking for a Sushi Boat. However, he didn't have enough money to pay for it and ran away.


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Eikichi and Ryuji in Bad Company when the two were known as Oni-Baku of Shōnan. Also pictured are Sakura Yamato, Isami, and Fukitoshi.

Eikichi has been better developed in Shōnan Junai Gumi, an earlier manga and anime series, where he was well known as part of Shōnan's Oni-Baku (Oni, meaning demon, comes from Onizuka - Baku, meaning bomb, comes from Danma, which means explosion). They were 16-year-olds and used to fight gangs that vastly outnumbered them; although, thanks to their abnormal strength and uncommon charisma, the two slowly become legends.

Despite being a delinquent, Onizuka was captain of his school's karate team.

Even now, in GTO, he is still well respected, revered, and even feared as the former leader of the Oni-Baku biker gang. His commanding respect is shown in the first episode of GTO, where three delinquent students in his class were tortured by Onizuka after they interrupted another biker gang's meeting, giving them a famous "Special Lesson".


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A colored illustration of Onizuka from the manga.

Growing up in Shonan where gang activities were common, Onizuka is a retired veteran member with great admiration in his hometown. According to Ryuji and himself, they were already delinquents back in their teenage years, with Onizuka fallen due to poor parenting and his father's absence. He was already involved in various crimes such as illegal races, fighting, and vandalism at the same ages of his own students. The duo have become nothing but eyesores to their teacher and were mistreated at best, making Onizuka and Ryuji mark their own teacher as the worst teacher and believe a dream teacher should put caring for their students as priority.

Onizuka attended Eurasia University and managed to pass only by cheating. He was captain of the karate team,[1] and his major was Sociology.[2]

Onizuka decides to become a teacher after seeing Erica's passionate love for her boyfriend – a bald, short and unbecoming man who happens to be her teacher.[1] He begins his practical training in the Musashino Public High School where he meets the womanizing teacher Hidero Osawa and student Nanako Mizuki, who would become the first troubled teenager whose problems Onizuka would solve with his unique methods.

The miracles he produces throughout the whole series display his great strength, character, and ability to help his students solve their problems: earning their friendship with perseverance, determination, and hard work.


Ryuji Danma[]

Ryuji and Onizuka have been best friends for a long time, since they both previously led the Oni-Baku biker gang for several years before the start of GTO. In Bad Company, they meet in middle school and after fighting each other to a draw, become best friends. Their friendship is cemented when Ryuji goes to back up Eikichi in his fight against the Skull Gang to get back his motorcycle.

Shinomi Fujisaki[]

Eikichi and Shinomi went to middle school together, but he always saw her as like a sister to him. This was very frustrating to her, especially after she went on a diet and made herself more attractive to get his attention. He and the Oni-Baku came to rescue her from the Idaten gang. At times it seems like he sees her as more than a friend, but he always manages to say something stupid and destroy his chances of actually getting together with her. Just before he and Ryuji faked their deaths at the end of Shonan Junai Gumi, Eikichi gave Shinomi a deep, passionate kiss. She soon figured out he was still alive, but had no idea where he was until they reunited in Shonan 14 Days.

Toshiyuki Saejima[]

Saejima is one of Onizuka's oldest friends, and one of the few he keeps in contact with after leaving Shonan. Saejima is always trying to get Onizuka roped into one scheme or another, and they often fight, but they have each other's backs when it counts.

Misato Hazuki[]

Eikichi met Misato at a karaoke bar where she worked, and they soon hit it off. She even offered to be his first time, but he refused to have it with someone he didn't know well. They started getting serious, and even made plans to run away to Tokyo together. Eikichi was shocked when Misato revealed she was transgender, but it seems he still loved her enough to wait all day for her at the train station. She saw him, but decided to remain hidden and drive with a friend to Tokyo. Ryuji found Eikichi sitting at the platform in the dark, heartbroken.

Azusa Fuyutsuki[]

She is one of the Holy Forest Academy teachers. Without a doubt, he has a weak spot for her. Onizuka truly respects her and treats her as though she was his girlfriend. Over time, Azusa begins developing feelings for him and is shown to be shy around Onizuka.

Urumi Kanzaki[]

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Onizuka attempts to rid himself of a curse.

Probably the most dangerous of the school's delinquents due to her extremely high IQ score and classroom terrorism. Later on though, she is revealed as one of his greatest allies. Throughout the series, the two will develop a close relationship. She gets a crush on him, but he only sees her as like a younger sister to him, and refuses to take advantage of her.

Noboru Yoshikawa[]

Onizuka has put his life on the line several times for this boy. He has great respect for him due to his skill at video games. He is the first student whom Onizuka develops a friendship with. He is very loyal to Onizuka, who saves him from suicide twice in the first part of the series.

Ryoko Sakurai[]

Onizuka always listens to her requests and suggestions. Although his methods can be unconventional, she always supports him. However, other faculty may not like it.


  • He smokes Mild Seven (now known as Mevius), a Japanese brand of cigarettes (shown in Episode 23 of the anime).
  • His motto is "I want to remain a simple teacher for all my life!"
  • Interests: girls of legal age, cosplay, motorcycles, and to become the greatest teacher in Japan.
  • Heroes: Shōtoku Taishi (a prince from the Asuka period), Eikichi Yazawa (a Japanese singer and song-writer), Kenshiro (main character of the manga series Hokuto No Ken), Satoru Sayama (a Japanese wrestler), and Takumi Fujiwara (a famous driver from the anime series Initial D).
  • During an interview with the creator, Tohru Fujisawa, he confirmed that Onizuka's name does indeed come from Eikichi Yazawa. Also part of the creator can be found in Onizuka.

Anime and Manga Differences[]


  • At the end of the anime, Onizuka goes to teach in America at a junior high school in California; however, in the manga he remains at Holy Forest Academy.


Onizuka gangster style

Onizuka's first appearance & interview in the manga.

  • In the GTO manga, Onizuka goes to a barbershop in order to change his appearance to that of an adult; replacing his old regent hairstyle.[3]


  • "Eikichi Onizuka, 22-years-old, nice to meet you!"
  • "I got a bigger heart than you give me credit for."[3]
  • "Hi. I'm Eikichi Onizuka and I'm going to be your new homeroom teacher. I'm 22-years-old and very single!"
  • "I will make school fun!"
  • "Quit whining! You're pathetic! You call me "teacher" and become my students whenever it's convenient to you?! Don't underestimate me you jerks! Teachers are human too! They have a time for getting mad and a time for blowing it! Besides, I'm not a teacher yet officially!"
  • "Y'know, there's a name for people like you. I'll give you a hint; it starts with be- and it ends with -atch."
  • "If a teacher can’t trust others, what’s the point of it all?"
  • "When a teacher’s student is in danger, he can become almost superhuman."
  • "A brat who is afraid to be hurt isn’t qualified to love someone."
  • "Other people laugh at you? Short? Weak? That’s nothing if you really love him. Listen, Uehara. Real love will make you blind. Like yourself a little while ago."
  • "Vice Principal. If you yell too much, your baldness will get worse."
  • "SHUT UP!!! There’s a girl out here dying and all you can think about is your career!? There’s a word for teachers like you! GARBAGE!! Call the police! Call the Board of Education! Call anyone you like! Just don’t you dare call yourself a teacher. Not in front of me. Not ever again!! Four hundred students in ten years; so each one’s worth four-hundred!? Listen to yourself! Is that why your mother made you work so hard!? So you could spout off crap like that!? For you, maybe they were all just one in four hundred…just another slab of flesh in the long line at the registration table. But to them, you were their homeroom teacher. The only one they had!"


  • The name Eikichi means "excellent, fine" (英) (ei) and "luck, fortune" (吉) (kichi).
  • Eikichi's surname Onizuka means "demon, ogre" (鬼) (oni) and "mound" (塚) (tsuka/zuka).


  • Onizuka has been referred several times as a zombie throughout the series, due to the fact he avoided death by accidents so many times.
  • His canon birth date from Shonan Junai Gumi would make him a Leo, but Chapter 43 of GTO: Shonan 14 Days implies he's an Aquarius.
  • His first name is a reference to the rock singer Eikichi Yazawa.



  1. 1.0 1.1 Great Teacher Onizuka Ch. 1
  2. Great Teacher Onizuka Ch. 9
  3. 3.0 3.1 Great Teacher Onizuka Ch. 2


[v · e · ?]
Bad Company
Other Ryuji Danma  •  Manabu Midoji  •  Akira Nezu  •  Eikichi Onizuka  •  Masami Sato  •  Ryo Usami  •  Sakura Yamato  •  Takashi Yokokawa  •  Fukitoshi  •  Isami  •  Natsuki
Shonan Junai Gumi
Other Hiroshi Abe  •  Junya Akutsu  •  Mafuyu Aoki  •  Yoshiaki Asakura  •  Ryuji Danma  •  Shinomi Fujisaki  •  Makoto Hashiri  •  Misato Hazuki  •  Kenkichi Hino  •  Yui Itou  •  Mariko Izumo  •  Nao Kadena  •  Jun Kamata  •  Kaoru Kamata  •  Toshiki Kamishima  •  Junji Kashiya  •  Yoko Minamino  •  Saya Minazuki  •  Ayumi Murakoshi  •  Nagisa Nagase  •  Kunito Nakajo  •  Mitsuaki Okubo  •  Eikichi Onizuka  •  Ms. Onizuka  •  Toshiyuki Saejima  •  Ashura Sakaki  •  Masami Sato  •  Fumiya Shindoji  •  Natsuki Smith-Mizuki  •  Akira Takezawa  •  Yoshio Tamaru  •  Akimitsu Tamura  •  Tsuyoshi Tsukai  •  Katsuyuki Tsumoto  •  Aina Yarita  •  Joey  •  Kitamura  •  Mauchi  •  Nakagaki  •  Saegusa  •  Yasuo
Great Teacher Onizuka
Faculty Misuzu Daimon =  •  Hajime Fukuroda  •  Azusa Fuyutsuki  •  Nao Kadena   •  Kazumi Kahara   •  Minami Kikukawa =  •  Itagaki Kinoshita  •  Hiroshi Kochatani  •  Ippachi Maruyama =  •  Naoko Moritaka =  •  Eikichi Onizuka  •  Hideki Ozawa *  •  Noboru Saito    •  Ryoko Sakurai  •  Tadashi Sakurai  •  Koji Sanomaru  •  Suguru Teshigawara  •  Hiroshi Uchiyamada  •  Ms. Fujimori *  •  Mikan *  •  Momoi *  •  Mr. Ōgi =   •  Ms. Sagara  *  •  Takahama *
Students Miyabi Aizawa  •  Megumi Asakura  •  Mayuko Asano  •  Akane Fujita   •  Kouji Fujiyoshi  •  Aoi Fukada =  •  Kumiko Fukada  •  Makoto Fuyutsuki =  •  Ruruka Hitika =  •  Saeko Iijima  •  Naoko Izumi  •  Takumi Ishida =   •  Urumi Kanzaki  •  Yoshito Kikuchi  •  Hitomi Kizaki  *  •  Fuyumi Kujirakawa  •  Tadaaki Kusano  •  Gunjin Mishima  •  Miki Miura *  •  Nanako Mizuki *  •  Yuuki Miyamori =  •  Kunio Murai  •  Tomoko Nomura  •  Hidemi Ohta  •  Yoko Sato  •  Sho Shibuya =  •  Chikako Shirai  •  Mokuba Shirai  •  Haruo Tokida  •  Ai Tokiwa =  •  Anko Uehara  •  Mayu Wakui =  •  Mizuki Yokoyama    •  Noboru Yoshikawa  •  Dadashima  •  Ebisawa   •  Erica =  •  Gaia  •  Hitomi  •  Ito =  •  Kamioka  •  Katsuyama   •  Keiko =  •  Kitsuki =  •  Madoka  •  Marcia  •  Miho =  •  Miko  •  Minakami =  •  Mishima =  •  Miyazaki  •  Nakamura  •  Onodera =  •  Ortega  •  Sakaki =  •  Shiozaki   •  Takanaski
Family Masayo Aizawa  •  Kotaro Aizawa  •  Takashi Kadena   •  Gonjiro Miyamori =  •  Julia Murai  •  Chizuru Ohta  •  Tooru Ohta  •  Maho Sumida =  •  Takeru Teshigawara =  •  Ryoko Uchiyamada  •  Yoshiko Uchiyamada  •  Yuichi Uehara  •  Eikichi (dog)  •  Mrs. Fujiyoshi  •  Ms. Kanzaki =  •  Mr. Kizaki  •  Mr. Mizuki  •  Mrs. Mizuki  •  Mr. Nomura  •  Mrs. Uehara
Other Suzunosuke Akao =  •  Ryuji Danma  •  Shinomi Fujisaki =  •  Megumi Hoshino  •  Kouichi Igarashi   •  Heihachi Mishima =  •  Rinka Morishita =  •  Nagisa Nagase  •  Yuko Nagashima  •  Motoko Ohashi  •  Ichiro Okinoshima  •  Toshiyuki Saejima  •  Kyoko Sasaki  •  Hiromi Tatsukawa  •  Koari Ueda  •  Miki Wakamatsu  •  Ageha =  •  Ms. Ashida  •  Futogaki  •  Hide  •  Mr. Hiramatsu  •  Mr. Kibayashi  •  Kojima  •  Mah =  •  Megumi =  •  Mr. Mizushima  •  Mutō  •  Mr. Shirosawa
GTO: 14 Days in Shonan
Caretakers Shinomi Fujisaki  •  Eikichi Onizuka  •  Ayame Shiratori
Juveniles Seiya Dojima  •  Miki Katsuragi  •  Haruka Kuwae  •  Ryoichi Mizuhara  •  Ikuko Ogaki  •  Miko Sakaki  •  Riko Sakaki  •  Keiichi Satomi  •  Mio Satomi  •  Sakurako Sugawara
Other Kyosuke Abeno  •  Junya Akutsu  •  Ryuji Danma  •  Kouji Fujiyoshi  •  Hironosuke Fukumizu  •  Azusa Fuyutsuki  •  Urumi Kanzaki  •  Yoshito Kikuchi  •  Tadaaki Kusano  •  Jiro Makita  •  Kunio Murai  •  Nagisa Nagase  •  Toshiyuki Saejima  •  Fumiya Shindoji  •  Tsuyoshi Tsukai  •  Katsuyuki Tsumoto  •  Hiroshi Uchiyamada  •  Ryoko Uchiyamada  •  Yoshiko Uchiyamada  •  Eikichi (dog)  •  Wataru  •  Yayoi
GTO: Paradise Lost
Faculty Azusa Fuyutsuki  •  Kodama Nana  •  Eikichi Onizuka  •  Ryoko Sakurai  •  Kagetora Tendo  •  Hiroshi Uchiyamada  •  Kamogawa  •  Kimijima  •  Sasamoto  •  Takamatsu  •  Ubukata  •  Yamanoi
Students Megumi Aiba  •  Yuuji Akasaka  •  Jiyuri Itsuki  •  Hina Hinakawa  •  Yuka Hiroshe  •  Mamoru Kuroishi  •  Kazuki Mihara  •  Kyoko Miyaji  •  Yuuto Narita  •  Tetsuya Niizaki  •  Ririka Nishiwaki  •  Tomoko Nomura  •  Natsu Ooishi  •  Ayu Sakura  •  Ayaka Shiotani  •  Hitomi Tani  •  Arisawa  •  Maho  •  Numacchi  •  Ozeki  •  Sumire
Family Yuko Kuroishi  •  Ryoji Mihara  •  Reika Nishiwaki  •  Ryoko Uchiyamada  •  Yoshiko Uchiyamada
Other Souichi Araragi  •  Ah Ashura  •  Ryuji Danma  •  Eri Domyoji  •  Asako Iimori  •  Kengo Iimori  •  Shizue Iimori  •  Takeshi Inumaru  •  Kasumi Ishiguro  •  Morinoshin Itou  •  Akutsu Junya  •  Aja Konda  •  Tatsuya Kunimatsu  •  Nakajo Kunito  •  Kumi Marugari  •  Masao Marugari  •  Mayu Matsumoto  •  Yuka Miyagaki  •  Jun Morita  •  Taku Muroi  •  Nagisa Nagase  •  Shizuku Nagura  •  Yuji Oba  •  Ichiro Okinoshima  •  Kento Oohashi  •  Toshiyuki Saejima  •  Reina Satomi  •  Fumiya Shindoji  •  Saki Yamaschi  •  Adams-sama  •  Akiyama  •  Daichi  •  Eikichi (dog)  •  Gen  •  Itou  •  Morinaga  •  Mura  •  Okita  •  Sakurada  •  Shinoda