All of Jujutsu Kaisen's Domain Expansion hand signs have similar meanings and affiliations with spirits, gods, or spiritual and religious concepts.

Jujutsu Kaisen Domain expansion hand sign is essential for unleashing potent sorcery. Domain Expansion, a pinnacle of jujutsu prowess, erects a cursed domain to overpower adversaries.

Now, Yuji has left Sukuna stunned with his Domain Expansion, and the manga has already teased its true power with help from a hand sign.

The only thing that fans saw was him making a hand sign and uttering the words “Domain Expansion.” What followed was Yuji, and Sukuna in Yuji's body, at a train station.