Full Metal Yakuza

Aspiring yakuza Kensuke Hagane (Tsuyoshi Ujiki) is killed by gang violence along his idol and Yakuza boss Tosa (Takeshi Caesar). Their corpses wind up in the hands of a scientist, who manages to keep Kensuke alive by replacing much of his body with cyborg pieces and some parts of Tosa, making him bulletproof and super strong. Kensuke then escapes from the scientist and searches for those responsible to get revenge.