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Seiko Miyazawa
Oton v01 132.jpg
宮沢静虎, Miyazawa Seiko
みやざわ せいこ
Nickname Oton
Quiet Tiger
Origin Japan
Gender Male
Age About 40
Voice Masakatsu Funaki (Japanese)
Dan Green (English)
Fighting Style Nadashinkage-ryuu
Family Kiichi Miyazawa (Adoptive Son)
Kiryuu Miyazawa (Brother)
Sonou Miyazawa (Brother)
Yumiko Miyazawa (Sister)
Debut Information
Manga Series Koukou Tekkenden Tough
Chapter 1: Becoming a Star
Chapter {{{debutchapter}}}
Anime OVA 1
Studies without concentration only breed a fist without reason.

– Seiko to Kanou's school teacher.

Seiko Miyazawa (宮沢静虎, Miyazawa Seiko) is one of the main characters in the manga series of Koukou Tekkenden Tough. He is often called Oton (オトン, Oton). His nickname is Quiet Tiger. Seiko was the former head of the Nadeshinkage Clan and also the adoptive father of Kiichi Miyazawa and brother of Kiryuu and Sonou. He is the current user of the tiger kick.


Stern but caring, Kiichi’s father Seiko is the current head of the underground murderous fighting school Nanshinkage-ryuu. His unrivaled strength combined with his gentle nature and wisdom have earned him the nickname "The Quiet Tiger".

Seiko is revealed to be a very strict yet caring person, to his son at least, as he is very strict on Kiichi's training, not helping him with his ailment, and yet had helped him achieve the secret technique, Bosatsuken (fist of Bodhisattva).[1][2] Seiko deeply loves his son Kiichi and trains him harshly to prepare him for the hardships he will face as the next head of Nanshinkage-ryuu.


Seiko has a buzz cut, having a full head of hair on top, and showing much skin on the side of his head. He is usually seen wearing casual clothing, and may sometimes go topless, during times of training with his son.[3][4] He is also seen, when going out, wearing a black business suit, coming with a black tie, buttoned-up white shirt and dress shoes.[5]

At the time of Tough: Ryuu wo Tsugu Otoko, his appearance has barely changed at all, with the exception of his hair, as he now has a distinctive grey streak on it.



Seiko had once faced against Iron Kiba, in a death match with him. Seiko had suffered from major injuries, but in the end he had won against Kiba, costing Kiba an eye in the process, making Kiba very angry and obsessive over beating the Nadashinkage-ryuu.[6]

Koukou Tekkenden Tough[]

The True Inheritor Arc[]

Seiko first appeared eating at the table, in which he told Kiichi he must wake himself now, being a second-year high school student.[7] Seiko was then seen going to work, and told Kiichi, after washing the graffiti off his doorstep, to help the neighborhood with yard work[8]

Seiko, after being asked by his son, decides to spar with Kiichi. Seiko teaches Kiichi that eyesight is essential for the martial art style, understanding the weak points of the opponent. Kiichi then charged at Seiko, in which Seiko is able to block Kiichi's Bone Breaker, bruising Kiichi foot. Kiichi tries to hit Seiko in the face, but Seiko blocked it, and used Hashin Shou to stop Kiichi's heart. Kiichi got mad at Seiko, but Seiko told Kiichi the meaning of the martial art style they use, Nadashinkage-ryuu the Art of Life and Death.[9]

Deadly Physique Arc[]

Seiko was then seen at his house, and noticed Kiichi's ailment, as Kiichi could no longer hold down his food like he used to. Seiko then trained with Kiichi, and inspected his body, and found out that Gouji Kanou had hit his chuin. He told Kiichi that martial arts were supposed to be used to kill, and those who do not have compassion will most likely win the fight, kindness was weakness.[10] Seiko told Kiichi about the technique Gouji used, a technique that would kill him in three years, telling him Gouji is far more dangerous knowing the human body pressure points.[11]

Seiko then went to the hospital, to find his son hurt in bed. He uses oriental medicine which healed Kiichi, hitting Kiichi's vertebrate. He then carried his unconscious son from the hospital to the Miyazawa residence, where he told Kiichi to hit him with his Hashin Shou. Seiko was able to easily avoid it and then tells Kiichi, that his Hashin Shou will never hit a moving target. He then showed Kiichi a secret technique to use instead, Fist of Buddha, which had left a mark on the tree.[12]

Seiko helped Kiichi with his training of the Fist of Buddha technique, inconspicuously, as he had helped Kiichi see death's light, through the near-death experience of a car crash, although he was noticed by Mitsuhide Kuroda.[2]

Seiko was then seen watching his son, as he fights with Gouji.[13] When the teacher for Gouji, tried to stop the fight between Kiichi and Gouji, being rejected by Gouji, Seiko explains to him, that in order for Gouji to improve his Judo, he must fight without excessive preventions.[14] He had then explained that Kiichi was able to beat Gouji, because he had reached a state of consciousness that only Buddha's have been able to reach, using Bosatsuken twice.[15]

Seiko was then seen walking with his son, when his son asked him if he was going to respect him more. Seiko then reward Kiichi by giving him the ability to eat again. Seiko was then later seen, during the night, at the house eating a lot, as it is revealed that Seiko had been fasting along with Kiichi in order to keep up with him.[16]

Fear of the Wrestlers[]

Seiko is next seen eating out with his son, when he had to stop a wrestler named Fujita, from further abusing his companion Kouji Funada. He then broke Fujita's arm, after being goaded by Fujita to fight him, and then runs away with his son.[17]

Seiko and Kiichi run all the way to the docks, Kiichi asked why Seiko had used his full force against Fujita, to which Seiko told Kiichi that he knew the fear of the wrestlers. they were then confronted by Funada, who had followed them, who asked Seiko to fight him next.[18] Kiichi however steps in for Seiko, and before they are able to fight Kiba comes. he and Seiko's past together. Seiko then allows Kiichi to fight in his place going to go against Funada.[19] Seiko talks with Kiba and tells him not to underestimate Kiichi, who is the Nadashinkage-ryuu inheritor. He watches as his son defeats Funada and intervenes when he saw that Funada would not stop until his actual death, knocking Funada out before such a thing could happen. Seiko then hears Kiba's proclamation of having his wrestling go up against the Nadashinkage to which Kiichi accepted.

Seiko is then seen at his home, being angered about something. He had shown Kiichi what was unsettling him, which was that Kiichi's fight with Funada was known and that the Nadashinkage-ryuu was known to the public, which was supposed to be a shadow style not known to anyone. Kiichi did not understand what the significance of this meant and Seiko had proceeded to kick Kiichi. Kiichi was able to block the kick but unable to see the palm that Seiko had given him before the kick. Seiko smiles and tells Kiichi not to fight against the wrestlers.

Seiko was then seen at the warehouse, where he and Kiichi trains, finding that Kiichi was protecting his elbow. He inspected Kiichi's body, to find that some of his ligaments and joint were injured. Seiko had deduced that Kiichi had fought against Heizou Onikawa, "The Destroyer", and had told Kiichi that he had only won because Heizou let him do so.

Seiko was then seen buying some benito and walking out the store where he was approached by Kiyomasa Samon.


Having practiced Nadashinkage-ryuu for a long time, Seiko is a master of the martial art style, helping Kiichi practice and give him advice on how to use martial art.[20]

Seiko has practiced oriental medicine, knowing all of the human body's pressure points, and using them to heal his son, whose injuries was too serve for occidental medicine.[21]

Seiko also possesses the physical condition called the Tiger Foot (虎腿, Taigā Futto), which only occurs in 1 in 2 million martial artists. This causes the musculature of his legs to develop abnormally tougher and rigid. Seiko takes advantage of his Tiger Foot in smashing kicks.



  • The character's appearance is possibly based on the real-life karateka named Takashi Ozawa and Arnold Schwarzenegger. His name is probably based on Seiko Fujita, a prominent Japanese martial artist.
  • Seiko is actually the younger twin.


  1. Koukou Tekkenden Tough Manga: Chapter 19, page 12
  2. 2.0 2.1 Koukou Tekkenden Tough Manga: Chapter 20, pages 18-21
  3. Koukou Tekkenden Tough Manga: Chapter 1, page 7
  4. Koukou Tekkenden Tough Manga: Chapter 6, page 9
  5. Koukou Tekkenden Tough Manga: Chapter 19, page 6
  6. Koukou Tekkenden Tough Manga: Chapter 29, pages 10-15
  7. Koukou Tekkenden Tough Manga: Chapter 1, page 7
  8. Koukou Tekkenden Tough Manga: Chapter 3, page 3
  9. Koukou Tekkenden Tough Manga: Chapter 6, pages 8-18
  10. Koukou Tekkenden Tough Manga: Chapter 17, pages 6-16
  11. Koukou Tekkenden Tough Manga: Chapter 18, pages 4-7
  12. Koukou Tekkenden Tough Manga: Chapter 19, pages 6-19
  13. Koukou Tekkenden Tough Manga: Chapter 25, pages 3-4
  14. Koukou Tekkenden Tough Manga: Chapter 25, pages 11-14
  15. Koukou Tekkenden Tough Manga: Chapter 26, page 18
  16. Koukou Tekkenden Tough Manga: Chapter 27, pages 13-19
  17. Koukou Tekkenden Tough Manga: Chapter 28, pages 11-16
  18. Koukou Tekkenden Tough Manga: Chapter 28, pages 17-20
  19. Koukou Tekkenden Tough Manga: Chapter 29, pages 1-17
  20. Koukou Tekkenden Tough Manga: Chapter 9, pages 9-18
  21. Koukou Tekkenden Tough Manga: Chapter 19, pages 8-9
  22. Koukou Tekkenden Tough Manga: Chapter 19, pages 15-19