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Kodai Yamamoto (山本 幸大 Yamamoto Koudai) is a secondary character in the Confession Executive Committee ~Love Series~. He is a Sakuragaoka High School student in Class 1-1, and a friend and member of the "Idiot Trio" consisting of himself, Kotaro Enomoto, and Ken Shibasaki.

Kodai Yamamoto
Characters koudai
Kanji 山本 幸大
Rōmaji Yamamoto Kōdai
Hair color Black
Eye color Grey
Height 175 cm (5'8")
Blood type A
Birthday November 7th (Scorpio)
Occupation High School Student
Japanese Yoshitsugu Matsuoka
First Appearance
Song Ijiwaru na Deai

Songs Edit

Main Focus


Multiple Focus:

Appearance Edit

Kodai is the third tallest male student at 175 cm. He's also the only one of the characters that regularly wears glasses, unlike Koyuki Ayase, who does need seeing aid but uses contacts instead.
He has short, black hair that sticks up in two pieces at the top and bottom, with asymmetrical bangs cut above his forehead that are parted in the middle. He wears his uniform blazer open and shirt tucked in.

Personality and ActionsEdit

Of the "Idiot Trio" consisting of Ken, Kotaro, and himself, Kodai is by far the most levelheaded member. He's not one to lose his head over minor inconveniences, but does make his anger and displeasure known in subtle ways, such as a change of tone or sarcasm. Otherwise he's quiet and out of the way, watching everyone from the sidelines. Has a calm personality.
In addition, he's attentive and willing to hear his friends and others out. Whenever Ken or Kotaro have the chance to talk to him alone, they always end up spilling out their thoughts, and he's ready to provide support or an answer to their worries. 


He likes to read in his spare time, and is never seen without a book in his hand. He also seems to love photography, given that he has a whole lab of camera equipment and takes pictures of the cast on occasion.

Relationships Edit

Kotaro Enomoto Edit

Friend since middle school. Often seeks advice about his various circumstances, so Kodai gives off his perception of things and gives him advice as he needs it.

Ken Shibasaki Edit

Friend since middle school.Ken likes to pester him about various subjects, but Kodai always rebuffs him or ignores any attempt to get under his skin. He does seem curious about Ken's serious moments or quizzical reactions when he's somber, but doesn't press further into the matter.

Arisa Takamizawa Edit

In the same friend group. They don't talk very often, but they are acquaintances.

Hina Setoguchi Edit

An acquaintance. Kodai knows about Kotaro's crush on her.


  • Kodai is not the only person whose seiyuu did not sing for their character (the others being Ken Shibasaki and Hiyori Suzumi).
  • As of 2019, Kodai has yet to obtain a solo or a song from his perspective, along with Aizo, Hiyori Suzumi, and Yujiro.