[quote=@Courtaud]
<Snipped quote by pugbutter>

a date for when the game will start or what timeframe the game begins in?

I don't have a hard and fast connection to one or the other, perhaps pre-cell phones would make storytelling easier. Maybe a 90's aesthetic could be fun. 

Is there anyone who has input they'd like to give in this regard?
[/quote]

The latter is indeed what I meant. At least narrowing it down to a decade helps me choose an aesthetic (hair, motorcycle, any gang paraphernalia etc.), but it also informs me on the legal and cultural climate of the Japanese delinquent world. In the 90's and early 00's street-gangs are on the decline because, in direct response to the bosozoku of the 80s, Japan would currently be passing anti-association laws. No more assembling in groups of 15 or more, no more wearing gang colors, and so on. And when you can go to prison for doing these things, the simple fact is that fewer teenagers are gonna have the guts for it.