First Appearance: Flashback, Chapter 1
Yuta Okkotsu is the grandfather of Yuka and Tsurugi Okkotsu, and one of the most celebrated sorcerers in post-Sukuna history. Originally a Special Grade sorcerer haunted by the spirit of his childhood friend Rika Orimoto, Yuta went on to become a cornerstone of the new jujutsu order following the Culling Game. He later married Maki Zenin and had a son, Iori, who would himself father the Okkotsu twins. Yuta passed away of old age before the events of Modulo, but his legacy permeates the entire series — Rika's ring, passed down to Yuka, serves as the emotional core of the siblings' rivalry and their connection to their grandfather's memory. In the Ritual of Harmony, his residual cursed energy — preserved across decades and channeled through Mahito's Idle Transfiguration — becomes the mechanism by which coexistence is made structurally permanent. Yuta saves the world again, posthumously, through the love he left in objects and people.
Yuta's innate technique that allowed him to copy and store any cursed technique he came into contact with, making him one of the most versatile sorcerers of his generation. The full breadth of techniques he accumulated over his lifetime was never catalogued.
Through his bond with Rika Orimoto, Yuta had access to an enormous reservoir of cursed energy far beyond his own natural output. Even after Rika's spirit was set free, a fragment of her will remained in her ring — the same ring that becomes central to Yuka and Tsurugi's story in Modulo.
