Saejima might be the scariest fucking character I've ever seen when it comes to fighting. Physically, he's stronger than kiryu (unless it's beast mode kiryu)
It's still hilarious how RGG was titled Yakuza in the west and that resulting in a game which you won't ever play as a (active) yakuza but you will play as a cop.
4:28 I think Essence of Wreckage (or whatever it's called in Yakuza 4, haven't played it yet, so I don't know if it's any different or not) fits Saejima especially well. It's like the scariest thing to see him do to random street punks.
Y0 was my introduction to the series as a whole and to Majima. Seeing him crack a wicked grin as he rolls his knee into some dude's sternum was a defining moment.