Yūji Endō (遠藤 勇次) is a dirty loan shark with ties to the yakuza. He lends out large sums of money to the desperate, but charges an absurd (and illegal) interest rate.
Tobaku Mokushiroku Kaiji Edit
He tracks down Kaiji after a client of his, Furuhata, who disappeared without repaying a loan, which Kaiji cosigned in an act of weakness. Recognizing Kaiji could never repay the loan, Endō offers him the opportunity to board the gambling ship Espoir, where he would be able repay his debt and make some money as well.
After losing on the Espoir, he offers him another opportunity to pay back his debt by participating at the Starside Hotels gamble, not revealing what the gamble actually is. Sahara, wanting a chance to score big, pleads to Endo to include him with Kaiji.
After bringing Kaiji and Sahara to the event, he is not seen again in the arc.
Tobaku Hakairoku Kaiji Edit
After Kaiji defeats Tonegawa his organization suffers because they now lack any connection to the upper management of Teiai.
After Kaiji is released from the underground labor camp and witnessing Sakazaki's failed attempt at beating the Bog, he goes to Endō for a loan to get enough money to beat it. He, Kaiji and Sakazaki form an alliance by signing an agreement contract.
Endō helps Kaiji borrow ¥50 million to beat the Bog and protects the Bog from being tampered with when it start clogging up. Towards the end battle with the Bog, Endō loans Kaiji another ¥10 million at a very high rate of interest. Due to Kaijis desperate state he fails to read the contract he signed or the interest rate he agreed on.
After Kaiji's victory he drugs Kaiji one last time and takes the money he owed him, while expressing disgust toward Kaiji's pointless code of chivalry when he decides to split his winning to his friends in the underground labor camp. Despite his underlings remark of his cruel treatment toward Kaiji, he states that he could have robbed Kaiji all his money if he liked to but he still has his code of conduct and then takes the amount of money Kaiji owned him.
With Kaiji's debt with him finally paid with an additional amount of money he had taken with his high interest rate, his connection with Kaiji is finally concluded. He has not been seen in the series since.
- In the live action film adaptation of the series, he does not make an appearance but is instead replaced by Rinko Endō, a film only character.