Sanehiro and Genya Shinazugawa are blood brothers, and not actually related. They're both rather abrasive, hot-blooded, and stubborn, often times impulsive and quick to lash out, Genya being more calm and patient one. Sanehiro is Genya's sensei. Sanehiro is about 21 to 23, while Genya is about 20 to 21, being younger then Sanehiro. They are Sanemi and Genya's reincarnations. They got into a bar fight once, scarred eachother's faces, and gained mutual respect for eachother since. They're cops.