It only means it's a prequel. It is basically 6th main installment in the series.The number 0 comes before the number 7, so what do you think?
Christ what a retarded thread
To be honest this is weird advice. I love me some Yakuza, but recommending someone to start with 1 on PS2 when there's a perfectly good remake of it, and prequel, in 2021 is just such a weird recommendation. Not hating on ya for it, it just seems so odd.Get a PS2 emulator and play Yakuza 1.
Or just start with 0, I suppose.