ish ima , ▁after ▁he ▁killed ▁his ▁mother , ▁car ries ▁him ▁to ▁the ▁top ▁of ▁a ▁mountain ▁and ▁call ously ▁throws ▁him ▁off ▁a ▁cl iff ▁to ▁test ▁his ▁son ' s ▁strength , ▁whether ▁he ▁is ▁fit ▁to ▁lead ▁the ▁M ish ima ▁Za ib ats u , ▁the ▁family ▁business , ▁and ▁to ▁see ▁if ▁he ▁will ▁be ▁able ▁to ▁clim b ▁back ▁up ▁the ▁same ▁cl iff . ▁K azu ya ▁surv ives ▁the ▁initial ▁fall , ▁but ▁left ▁a ▁large ▁scar ▁on ▁his ▁ch est ▁which ▁causes ▁a ▁demon ic ▁entity ▁within ▁him ▁called ▁the ▁Dev il ▁Gene ▁to ▁activ ate , ▁offering ▁K azu ya ▁the ▁opportunity ▁to ▁gain ▁immense ▁strength ▁and ▁power . ▁D ri ven ▁by ▁his ▁th irst ▁for ▁reven ge , ▁he ▁clim bs ▁up ▁the ▁mountains ide . ▁To ▁further ▁motiv ate ▁K azu ya , ▁He ih achi ▁adopt s ▁the ▁Chinese ▁or phan ▁Lee ▁Cha olan ▁and ▁ra ises ▁him ▁as ▁a ▁rival ▁to ▁his ▁true ▁son . ▁ ▁Over ▁the ▁years , ▁K azu ya ▁travel s ▁around ▁the ▁world ▁and ▁compet es ▁in ▁mart ial ▁arts ▁champion ships , ▁becoming ▁an ▁und efe ated ▁champion , ▁with ▁the ▁only ▁b lem ish ▁on ▁his ▁record ▁being ▁a ▁draw ▁against ▁Paul ▁Phoenix , ▁an ▁American ▁mart ial ▁artist ▁who ▁see ks ▁to ▁sett le ▁the ▁score ▁with ▁him . ▁Tw enty ▁one ▁years ▁later , ▁He ih achi ▁dec ides ▁to ▁test ▁his ▁son ' s ▁strength ▁and ▁worth