Путь Аса Вики
Катаока Тешин
Seidou High School
Baseball Coach
Bats: right Throws: right
Kanji 片岡 鉄心
Nickname Boss

Big Boss
General (将軍 Shōgun)
Demon Child (悪童 Akudō) [1]
Soul Ace (魂のエース Tamashī no Ēsu) [2]
Tetsu [3]

Gender Male
Date of birth 25 December
Place of birth Tokyo
Bloodtype O
Height 184 cm (6' 0.5")
Weight 77 kg (169 lbs)
First Appearance
Manga Chapter 4
Anime Episode 3
Voice Actor Hiroki Touchi
I don't know any other coach who knows his players this well while keeping a distance.
Rei about Kataoka[4]

Kataoka Tesshin is the coach of the Seidou High School Baseball Team. He is an alumnus of the school and has played as a pitcher in the past.[5] He is also a Modern Japanese teacher.


Kataoka is known as a strict coach, but he also praises his players and says reassuring things to them from time to time. Every thing he does is for the benefit of the team. He spares no effort. If he wants his players to make a significant step forward, he himself takes part in training.


Kataoka was a rowdy unmanageable brat with an evil look in his eyes and no manners. But he had the strongest will not to lose and is the one who ran the most among all the generations of Sakaki Eijirou's disciples. Sakaki was charmed by Kataoka's burning fighting spirit and gave him the ace number in the fall of his 1st year. At this time Kataoka was still not skilled enough, so there were objections from the higher-ups. Kataoka tried to listen and take advice, changing himself, and, whether due to unbelievable fighting spirit or self-awareness as the ace, he suddenly made a leap in his development as a pitcher. In the Fall Tournament they reached the semifinals. But in the summer of Kataoka's 2nd year they won the West Tokyo Regional Tournament and made it to Summer Koshien, Shutting down one strong team after another as they went, Katoka led Seidou to the Koshien Final, and they finished as the runners-up (Kataoka was said to have the unbreakable heart of steel, 'heart of steel' being what his name, Tesshin, literally means).

The qualified for Spring Koshien at the end of Kataoka's 2nd year as well and reached the quarterfinals. In Kataoka's 3rd summer they narrowly lost the chance to go to Koshien again, but he was the ace until the end. Kataoka felt guilty for not being able to make Seidou and Sakaki No.1 in Japan. He clearly said to the coach that he wanted to repay the favor to the high school baseball that had changed him and return to Seidou as an instructor which would have been difficult had he chosen to go pro. When Kataoka graduated from university, Sakaki resigned because he believed he could leave Seidou in Kataoka's capable hands.[6]

Relationships with other characters[]

Sawamura Eijun[]

Kataoka praises all his players and says reassuring things to them if he sees it fit. But he doesn't it quite like how he does it with Sawamura: feeling Kataoka’s reassuring hand on his shoulder is Eijun’s privilege, and it speaks volumes of where Kataoka’s affections and his faith rests (this may partly be due to seeing a bit of himself in Sawamura). Kataoka never once lost faith in the young pitcher when the later suffered from the yips, which is evidenced by the fact that he didn't pull him off the team.

Miyuki Kazuya[]

Kataoka acknowledges Miyuki's skill as catcher and trusts him greatly during games.

Ochiai Hiromitsu[]

Ochiai is curious about Kataoka and wants to know how good the later can be at being a coach. He often confronts Kataoka about their different way of coaching. Although they disagree from time to time Kataoka values Ochiai’s opinion as a coach and respects him.

Sakaki Eijirou[]

Sakaki was his former mentor and Seidou's former coach, now he is (allegedly) working as the general manager for H university team.


  • He is also an alumni of Meiji University, which is also called Meidai or M University. [7]


  • "Why didn't you all take the field with that kind of spirit from the beginning? After High School Baseball there is nothing else for you."[8]
  • "Even after being hit, he still has bright eyes. He is like a kid, who has just learned baseball."[9]
  • "Every throw, every step and every swing are a reflection of your true selves. No need to waver! Believe in your own style!"[10]
  • “I’m not looking at a first year like you for perfect contents yet. Make it count towards the next time - this experience."[11]
  • "A Giant will fall if you break his legs" [12]
  • "I don't know any other coaches who knows the players this well while keeping a distance."[13]
  • "These Kids have it in them right from the start. The strong will to face their opponents."[14]
  • "I don't plan on sacrificing the entire team just for Furuya."[15]
  • "Even if we've come this far in the tournament, in sports there is no way to know what might happen. You might be asked to go and play at any moment. Are you prepared for that mentally? Because I'm going to treat this game as any other official match and give you signs with that in mind. Let's take them down![16]
  • "The enemy is within oneself. Fighting full out with all of your power in the real game is the shortest path to victory."
  • "Ah, right! Boss, you, too, prepare yourself please. Only 2 wins left till Koshien! And we won't let you just resign and abandon the team that won the right to be there!"[17]



  1. Act I, Chapter 323
  2. Act I, Chapter 412
  3. Season 1, Episode 29
  4. Manga chapter 204
  5. Chapter 342
  6. Sakaki talking about Kataoka in his high school days with Haruno in chapter 324
  7. In Japan, popular universities often have their name shorten such as Tokyo University is called Todai while Meiji University is called Meidai
  8. Kataoka to the first years in chapter 14.
  9. Kataokas thoughts about Eijun in chapter 16.
  10. Kataoka to the team in chapter 97.
  11. Kataoka to Eijun after being hit in chapter 110.
  12. Kataoka in chapter 124
  13. Takashima Rei's thoughts about Kataoka in chapter 204.
  14. Kataoka about the team in chapter 206.
  15. Kataoka to Ochiai in chapter 223.
  16. Kataoka to the reserves team during their in-team game in chapter 319f
  17. Eijun to Kataoka in chapter 317.