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Was his dad run out of the Yakuza and just ended up in Vegas somehow?

On that note, I take it you're American, so why make your main character Japanese? Are you making a particular statement as to the contrast in the cultures or are you just of a mind that it's manga therefore the main character must be Japanese? Because if it's the latter be prepared to be laughed off the forum.

Is this character younger than 15 because you're younger than 15? What exactly would his father expect the kid to do for the organization? He can't drive so running packages is out. Having his father pressuring him to sell drugs to his classmates is the most likely answer, but the kid wouldn't be very good at that since Daddy dearest would probably move the kid from Tokyo to Vegas and then the kid wouldn't have any friends to sell to.

Did you think about any of this?

That said, kind refreshing to see someone taking a stab at a crime comic.

What the hell use would the mafia have for a 15 year old? Seriously? Worse still, a possibly unwilling 15 year old? Up his age and then we'll talk.

OOOOOOOOOOOOOOOKKKKKKKKKKKKKKKKK!!!!!!!!!!!
i put some thout about the plot so i changed it will answer all you need to know

first Plot-Sena Tenkicho is a normal japanese boy who lives in Tokyo,Japan,he thinks his father is dead but what he dosent Know is that his father is a leader of a Las Vegas mafia and what he dosent know is that he's going to join them the second he becomes Fifteen.

New Plot-Sena Tenkicho is a normal japanese boy who lives in Tokyo,Japan,he thinks his father is dead but what he dosent Know is that his father is a leader of a Las Vegas mafia and what he dosent know is that he's going to join them the second he becomes sixteen.

The resaen why his father is in Los Vegas is cause when he was in japan he was in the most powerfull mafia gang but when a member tells the american cops info about the gang he frames Sena's father (his name is Sven) so the cops take him in and deport him to america (the resaen why he tells the americans is cause in this manga theres internatinole gang fights and drug dealers) he escapes with some other prisoners from prisen after geting life.So they deside to go to Los Vegas when the get there they join a mafia gang for a little while then they form there own called Brothers.At the the time Sven had no idea about about Sena so when he found out about Sena he sent hes best friend/he's right hand man/second in coman in the mafia(named Kendo) finds Sena and trians him to be a mafia gang members to make his way up to get the right to see his father.

In the manga Sena is in some mafia gang fights and fihgt The Numbers a band of people how wont world peac and will do anything to get it and sena might find some love on the way.

p.s
He's mother thinks he's in Los Vegas as a school project

p.s.s
its a Comedy,actionm,vilonte,with maybe some romace

Okay so by "make him older" we don't mean make him ONE YEAR older. Try 19...20. And even then, he'd be an underling...

Er... No idea. I don't read Jump. Which Jump in particular? Shounen?

EDIT: Yeah, it pretty much does sound like Reborn!.

I wonder if OP wanted us knowing that. Lulz.

Anyways, why have the character be from Japan? Have you lived in Japan? Do you have a valid sense of what it is like living in Japanese culture that isn't from manga?

Is this supposed to be a realistic comic? Or does it have one piece gag logic?

50% of nothing is still nothing.

Compensate the artist monetarily or not at all. Deals to get a "percentage of profit" or "20% of all merchandise sales" always end up with absolutely nothing for the artist in question.