The young, ambitious manager of an underground casino owned by the Teiai Corporation. He is the mastermind of the Bog, a rigged pachinko machine in which every ball is worth 4,000 yen, with a payout of over 500 million. He is Kaiji's opponent in the second part of the manga.

Several months after the events of the first season, Kaiji, with his appendages reattached and his debt now run up to 9.5 million yen, is still desperately seeking the elusive big score that will cancel all of his markers. Unbeknownst to him, Hyodo’s company, the Teiai Corporation, is actively searching for Kaiji, and have sent Kaiji’s old “friend” Endoh, who entered him in the high stakes games in the past, to find him. 
The two meet when Kaiji chances to walk in front of Endoh’s car at a stop light, and thinking that he has found the answer to his prayers, Kaiji gets in the car with him. While Kaiji and Endoh are “happy” to see one another, and both want to see Kaiji’s debt repaid, their means to that goal couldn’t be more different. 
Instead of leading Kaiji to the big score, Endoh delivers him drugged and docile to the Teiai Corporation’s secret underground labor camp where Kaiji will have an opportunity to repay his debt… with 15 years of hard labor. 
(Source: Sea Slugs)

__Alma Mater:__ Tokyo International University

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Teiai Group is one of Japan's largest firms. Yukio Tonegawa, a man with a larger-than-life presence and sharp intellect, works as the right-hand man of Chairman Kazutaka Hyodo. One day, the chairman commands Tonegawa to spearhead "Game of Death," an evil project that employs debtors. He rallies his direct reports and scrambles to form Team Tonegawa, only to encounter a barrage of challenges from the erratic chairman and his disloyal employees, ultimately leading to his demotion.
 
Team Tonegawa is bombarded with an onslaught of wide-ranging problems! "Mr. Tonegawa - Middle Management Blues -" is a spinoff of "Kaiji," the hit manga series that boasts a total circulation of over 20 million printed copies.
 
(Source: Nippon TV) 

Note: Episode 14-15, parts of 18, and parts of 20-23 of this entry adapts the Kaiji spin-off manga Ichinichi Gaishutsuroku Hanchou.

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After Kaiji's showdown with Chairman Hyoudou at the Starside Hotel, he's forced into labour at an underground mine. With his meagre daily wage, he'll be working for decades to repay his debt unless he does something about his miserable situation.
Kaiji decides to wager his earnings in an underground dice game for a ticket to get out of the mine for a limited period of time. But even if he surfaces, he only has one chance to win it big: by challenging the unbeatable pachinko machine nicknamed "The Bog."



Ichijou Seiya is a young prodigy who is the manager of the Teiai underground casino and the creator of the diabolical pachinko machine "The Bog." Before his fight to the death with his nemesis, Itou Kaiji, he had a youthful period when he was still smoldering and unable to make anything of himself. The story is set in Ooyama, Itabashi, Tokyo, a "bog" that has swallowed up the dreams, hopes, and despairs of young people, and is about the ambitions and difficulties of freelancer Ichijou and his younger colleague Murakami who move into the capital and live in a tiny apartment.

Teiai Group is one of Japan's largest firms. Yukio Tonegawa, a man with a larger-than-life presence and sharp intellect, works as the right-hand man of Chairman Kazutaka Hyodo. One day, the chairman commands Tonegawa to spearhead "Game of Death," an evil project that employs debtors. He rallies his direct reports and scrambles to form Team Tonegawa, only to encounter a barrage of challenges from the erratic chairman and his disloyal employees, ultimately leading to his demotion. 
 
Team Tonegawa is bombarded with an onslaught of wide-ranging problems! "Mr. Tonegawa - Middle Management Blues -" is a spinoff of "Kaiji," the hit manga series that boasts a total circulation of over 20 million printed copies. 
 
(Source: Nippon TV)
 
Includes 9 bonus chapters.

A tribute manga book to the author Nobuyuki Fukumoto with the cooperation of Fukumoto himself. All characters shown in this series are from previous manga Fukumoto has published.

Seiya Ichijou