When it comes to Japanese developers, creating crazy, nice games isn't the only thing they're good at; they also design characters with pumped-to-the-max muscles, half of which don't even exist in real life and have the size of a truck. And they are all really serious about beating the hell out of everyone around them.
Dio (Jojo's Bizarre Adventure / JoJo's Venture)
source: JoJo Madara's LP
Kazuma Kiryu (Yakuza series)
source: Official Yakuza Website
Raiden (The King of Fighters series)
source: gamesharkdude2's LP
Kenshiro (Fist Of The North Star)
source: MyKOEITV
Haggar (Final Fight series)
source: Final Fight Guy, own screenshot
Big Bomberder (3 Count Bout)
source: HardcoreGaming101
Asura (Asura's Wrath)
source: Asura's Wrath Wiki
Sagat (Street Fighter series)
source: xxKALAMITYxx's LP
Great Puma (Pro Wrestling)
source: dommiesan's LP
The Bruiser Brothers (Super Punch Out!)
source: Adeigar's LP
You should show us in the comments below (with visual support!) what other, even crazier musclebound Japanese characters you know.