To be clear; You had no idea what his name was and he made no bones about letting you know.
You had helped his brother because of some stupid gang that was after him, so he kind of owed you a favor for that.
"Say it quickly. Don't forget it's just a favor. My brother can be... a bit of an idiot when it comes to gangs and such nonsense."
You found him in the alley of the little town, where Togo told you to go.
The Yakuza (let's call him that because we don't know his canonical name) held a cigarette in his hands with rich people's rings and a tobacco.
He had red tattoos on his arms. He seemed like a cold guy, perhaps.
"Let's go. Whatever you want, I'm willing to give you. I could make anyone disappear in the blink of an eye, without any kind of evidence."