Arc 9Lanyu’s Death and the Yugakure Mission
Akaseki developed his Sharingan and sealing abilities while serving in the war, then learned that Lanyu had died under mysterious circumstances. Jiancheng assigned Akaseki, Minato, and Ranwu to investigate the Jashin Cult in Yugakure, where the Hell Yama King’s claim to immortality raised new questions.
- Akaseki contracted with the Hell Yama King, tested its healing and surveillance abilities, and helped deliver Might Guy safely after Kayo suffered a dangerous labor.
- After Kagami’s death, Konoha declared war on Amegakure, and Akaseki served with Ranwu in the medical unit, where they treated poisoned and severely injured shinobi.
- Akaseki, Minato, and Ranwu’s search for a missing patrol team led to a battle with Ebizo’s forces, where Zhenpan attacked under puppet control and Akaseki ended his suffering after awakening his Three-Tomoe Sharingan.
- Back in Konoha, Akaseki promised to help Obito with the Sharingan, learned forbidden Sharingan techniques from Jiancheng, and developed the Awakening Seal to trigger a dojutsu automatically under set conditions.
- After Lanyu died, Jiancheng revealed the hidden Setsuna Uchiha, who demonstrated Water Style techniques for Akaseki to copy.
- Jiancheng told Sarutobi that Lanyu’s coded message named the Jashin Cult, immortality, and Rashomon, then arranged for Akaseki, Minato, and Ranwu to investigate in Yugakure.
- As he prepared for the mission, Akaseki asked the Hell Yama King about the Jashin Cult and immortals, and the spirit called itself the god of immortality.