[2] Described by Gramophone as a "fire-breathing virtuoso with a poetic charm"[3] and by Fanfare as "Liszt reincarnated",[4][5] he won the first prize, gold medal and Grand Prix at the 16th International Tchaikovsky Competition in 2019.

At the age of 11, Kantorow began studies with Pierre-Alain Volondat, who was the winner of the 1983 Queen Elisabeth Competition in Belgium, and continued training with Igor Lazko at the Schola Cantorum de Paris, as well as with Frank Braley and Haruko Ueda.

[2] At the age of 17, he performed at the Philharmonie de Paris with the Pasdeloup Orchestra at its inaugural season to an audience of about 2,500.

[12] He has since appeared at major concert halls including the Konzerthaus Berlin, Concertgebouw in Amsterdam, the BOZAR in Brussels, and the auditorium in the Louis Vuitton Foundation.

[14] On July 26, 2024, he performed the music of Maurice Ravel during the 2024 Summer Olympics opening ceremony.