The Japanese magician wowed judges and the audiences with his range of illusions, including levitating a spinning ring from the air onto Alesha Dixon’s finger.
Elsewhere in his performance, Keiichi involved Ant and Dec in a card trick, and made a card float and spin in the air as he danced around it.
He even appeared to make a note fold over in his hand without touching it.
Alesha, Simon Cowell, Amanda Holden and David Walliams were entranced by the performance, as the magician received a standing ovation from all four judges, with Simon stating how much his son Eric would ‘love’ watching the act.
‘He is brilliant,’ Ant added, with Dec chiming in: ‘I loved it!’
Ant and Dec boosted Keiichi to the live semi-final shows (Picture: Thames/Syco/REX/Shutterstock)
‘I loved it! You are funny, you’re quirky, you’re very, very charming and your magic was absolutely excellent. I mean, faultless,’ Amanda praised.
‘You’re the funniest person we’ve seen, and the most magical person we’ve seen, all combined in one,’ David added.
Simon said: ‘You are an absolute natural. People are going to like you so much. My son is going to love you, I mean, love you! You are one of the best we’ve seen so far.’
Alesha called the magician a ‘superstar’ (Picture: Thames/Syco/REX/Shutterstock)
Keiichi received a standing ovation from the judges after his impressive tricks (Picture: Thames/Syco/REX/Shutterstock)
After Alesha highlighted how much the cheering audience loved the performer, and called him a ‘superstar’, Ant and Dec ran to the judges’ panel to press their Golden Buzzer, pushing Keiichi straight through to the live semi-finals.
Backstage, Keiichi excitedly joined Ant and Dec as they celebrated the victory, with Ant repeating: ‘You did it!’
Now, only Alesha’s Golden Buzzer act remains to be seen.
Britain’s Got Talent continues next Saturday at 8pm on ITV and ITV Hub.