Ichigo is a soul reaper, he has incredible speed, even his bankai gives him leverage to multiply that speed. He has fought against many great warriors and won against them, he deflected a thousand blade coming at him from all direction, he defeated an aranka in less than three seconds, he was able to completely master holo form and perfected instant regeneration, he attained final katsuga tensho.
He defeated many opponent, they are; renji abarai, kempatchi, byakuya, espada no. 4 and others 