Koji Yoshida (吉田幸司 Yoshida Kouji, born June 23, 1978 in Chiba-ken, Japan) is Hiramaru Kazuya's editor. He tells the chief-editor in the meeting about his genius, which led to Hiramaru's serialization. He is able to ignore Hiramaru's personality. He is also a Captain, meaning he gets to sit in the serialization meetings and lead the other editors in his team, like Yamahisa. In the anime, he is voiced by Takehito Koyasu in Japanese.
Yoshida as seen on the 22nd episode of the anime.
Appearance
Yoshida wasn't seen for many episodes since his face usually covered by Hiramaru's text balloons. When seen, Yoshida is young man with black hair that falls just above his shoulders. In several scenes where he bribes Hiramaru, his thin lips are comically shown in detail, in the style of a dark, non-mainstream manga.
Personality
Yoshida is perhaps the most manipulative of the editors shown. When he realizes that forcing Hiramaru to work isn't applicable to an efficient and/or long-running series, he bribes him with rich items or information about Aoki Ko in order to get him back to work and pay off the debts he owes for buying such items. Yoshida is able to keep this running for an extended period of time, even threatening Hiramaru with disassociation with Shueisha if he does not get serialized again after Otters 11 gets canceled.
Yoshida's reason and rationality are even more key to his character. He is able to deduce that Niizuma Eiji was responsible for +Natural's artwork and worries that Hiramaru's manga will take a dive if he asks Aoki Ko out and gets rejected. This reasoning has its limits, however, as Yoshida was greatly surprised that Aoki accepted Hiramaru's proposal.
Summary
Serialization Meeting
New Years Party
Yoshida tries to talk to Hiramaru about Otters #11. When he meets Hiramaru, who was with Niizuma, Mashiro, and Takagi, he takes him away to talk about chapter three of Otters #11. Hiramaru asks him if he enjoys life, Yoshida just ignores it and says to use it as the tagline for chapter three. Yoshida later appears when Mashiro and Takagi say they aren't going to lose to Niizuma or Hiramaru.