In the context of the anime/manga “Jujutsu Kaisen,” the character Itadori Yuji is exceptionally strong due to a combination of factors.
Firstly, he possesses a significant amount of cursed energy, which is the magical energy used by jujutsu sorcerers in the series. This energy is generated by negative emotions such as fear, anger, and sadness, which are particularly potent in Itadori’s case due to his tragic backstory.
Secondly, Itadori’s physical strength and speed are also exceptional, which is partly due to his natural athletic ability but is also related to his extensive training as a track and field athlete.
Finally, Itadori’s strength is further enhanced by his symbiotic relationship with the cursed spirit Sukuna, who inhabits his body. Sukuna is an incredibly powerful cursed spirit, and Itadori can draw on his strength and abilities when he needs them, although this comes with the risk of Sukuna taking over Itadori’s body.
In short, Itadori’s strength is the result of a combination of factors, including his cursed energy, physical abilities, and the influence of the cursed spirit Sukuna.