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Seiya Ichijō (一条 聖也) is the young manager of a casino owned by the Teiai Corporation. He has worked at Teiai Group for many years and is the favored ace of Yoshihiro Kurosaki.

He created the pachinko machine called the Bog. It was made in a way that it impossible for anyone to get the max payout unless he desires it to.

He is Kaiji's opponent in the later half of the manga arc and is one of the main antagonists in the Tobaku Hakairoku Kaiji arc.

He also has a spinoff manga called Joukyou Seikatsuroku Ichijou where he is the main protagonist.


Ichijō sports a red (black in the manga) mullet that reaches his shoulders. He is known to have a particularly effeminate look and values his appearance a lot.

In the second season, he wears a typical black suit, but it is accented by a red dress shirt and a white tie.


He is shown to be very confident person. He is shown to have a superiority complex about his own abilities, and looks down on other people like Kaiji or his former classmates. However when unexpected events happens, he loses confidence quickly and will do anything to solve the problem.

He is shown to be a very patient and hardworking person due to how he has worked for the Teiai Group for 7 years, while being abused by Hyodo. He believes that his patience and hardwork will allow him to take control of the finances and assets of the Teiai Group. He believes that after Hyodo dies and Yoshihiro Kurosaki takes over the Teiai Group as the next leader, he will be able to follow Kurosaki's success to be his right arm man (No.2 Man) and the next future leader of the Teiai Group.


He first start his career by cleaning toilets at a casino owned by the Teiai Corporation. This is where he first meets Hyōdō, who orders him to drink wine from a basin he dipped his feet in.

He eventually gets promoted to manager and becomes a subordinate of Yoshihiro Kurosaki. Along with his right-hand Murakami, he runs an illegal casino which holds his creation, the Bog.

Tobaku Hakairoku Kaiji

He is first introduced when Sakazaki attempts to beat the Bog. As Kaiji begins to observe and study the Bog from a distance, Ichijō is seen being warned by Yoshihiro about Kaiji which Ichijō brushes off.

For Kaijis plan to beat the Bog to succeed, he planned to plant a false reason to break the Bog by sneaking into the casino office. Here Ichijō catches him and uses a finger nail piercing device on Kaijis hand as warning for any future attempts.

Kaiji later returns with Sakazaki and Endou in his group where they start their final battle with the Bog. Despite eventually learning that the group must have been cheating to pass the barriers he has set up for the Bog to be unbeatable, Hyōdō calls in and forces Ichijō to continue with the gamble.

After a long battle, Kaiji eventually succeeds at beating the Bog. Hyōdō then demands that Ichijō pay back the ¥700 million Kaiji won by working for 1050 years in the labor camp. As Ichijō is dragged away, Kaiji encourages him to return and challenge him again.

He has yet to be seen nor be mentioned after the arc.

Chuukan Kanriroku Tonegawa

He is shown conversing and praising Tonegawa when he visits his casino to play the Bog.

Tonegawa comments himself on this as being treated like a child with the amount of work Ichijō was putting into his emotional outbursts while Tonegawa breezes through the Bog with ease (this is due to Ichijō secretly meddling with the Bog to make it easier for his superior to beat). Unbeknownst to Ichijō, Tonegawa already saw through this and didn't say anything.




Live Action Adaptation

Character Sheets

Production Artwork

Staff Book



  • In Season 2, Episode 22, it was stated in an interview that Ichijō was created to be a moe character.