|Seidou High School|
|Bats: Right||Throws: Right|
|Nickname||Metabolic-senpai (メタボリック先輩) (by Sawamura)|
|Date of birth||23 September|
|Place of birth||Osaka Prefecture|
|Manga||Act I - Chapter 1|
|Anime||S1 - Episode 1|
|Voice Actor||Nobuyuki Hiyama|
|“||How much you can improve is really up to you.||”|
Azuma Kiyokuni was an arrogant 3rd Year at Seidou High the year before Sawamura, Furuya and Kominato joined the school. He and Sawamura ended up having a heated confrontation however, on the day that Sawamura was being given a tour of the school. He currently is a professional player.
He has a nasty behavior and is a big guy in description. The first time he is described as this is when he encountered Sawamura Eijun and only by Sawamura.
In reality he is a caring senpai, and goes out of his way to come support his alma mater and gifting the team with a multitude of supplies. He has stated in a message that he had Chris convey to Nori, that he only yells at the people/players that he likes and that he wants to keep an eye on.
Despite this, he is shown to be somewhat arrogant and extremely prideful in his batting and baseball skills.
He believes his charm point is his big stomach.
Act IEditWhen Sawamura comes to watch Seidou's practice Azuma is yelling at his teammate Kawakami Norifumi for cowardly pitching. He says if he isn't even going to try, he should go home to his farmhouse. Sawamura, who favors friendship gets angry and picks up a fight with him. Sawamura – who favors friendship – gets angry and picks up a fight. Rei takes the chance and contrives it, that Sawamura forms a battery with Miyuki Kazuya to challenge Azuma. In the end Azuma gets defeated.
|Seidou High School|
|Miyuki Kazuya • Maezono Kenta • Kuramochi Yōichi • Kawakami Norifumi • Asou Takeru • Nakata Ataru • Ono Hiroshi • Higasa Shōji • Seki Naomichi • Yamaguchi Ken • Kijima Rei • Kawashima Kengo • Shirasu Kenjirō • Mimura Ryōta • Watanabe Hisashi|
|Sawamura Eijun• Furuya Satoru • Kominato Haruichi• Kanemaru Shinji • Tōjō Hideaki • Kaneda Tadahiro|
|Yui Kaoru• Yūki Masashi • Okumura Kōshū• Mogami Takeshi • Asada Hirofumi • Seto Takuma • Kuki Yōhei
|Former players||Yūki Tetsuya • Tanba Kōichirō• Kominato Ryōsuke• Masuko Tōru• Isashiki Jun • Miyauchi Keisuke • Sakai Ichirō • Kadota Masaaki • Kusunoki Fumiya • Takigawa Chris Yū • Azuma Kiyokuni
|Managers||Fujiwara Takako • Umemoto Sachiko• Natsukawa Yui• Yoshikawa Haruno
|Staff||Kataoka Tesshin • Ochiai Hiromitsu • Takashima Rei • Kazuyoshi Oota|