Yakuza 2 was released in the west two years ago without any kind of promotion, causing many to miss it completely, as the current generation was already well underway.
Now that Yakuza 3 is out, Classy Gamer reviews it's worthy predecessor, sporting one of the most complex and fun combat systems on the PS2 and an equally deep story.
I feel ashamed not having played the first two, but I'm actually interested in jumping in with the third one, assuming I ever find the time.
If you still have a PS2 getting the first 2 and at least playing the naked story (which normally takes about 20 hours each) might be a good idea. At least the second chapter is very worth it, and it's 100% compatible with a backwards compatible PS3 too.
If you don't have a chance to, luckily the 3 has two movies showing the story of the first two games quite in depth, so you wouldn't be left in the dark.
Playing the previous games is good to build an emotional link with the characters before you start the third :D
I really do want to pick up the first two now, so I can have them played when I get around to getting this one.
i just started playing this game today.
I really wanna play 3, but kinda feel obligated to play 1 & 2 before, which is too time consuming : /