Arc 4A Captain’s Loss
Jun intervened in Kakyō’s story, helped Soul Society survive escalating Hollow attacks, and forged ties with Arrancar and outcasts. After Isuzu was mortally wounded and became a Hollow, Jun accepted command of the Tenth Division while leaving her fate in Oka’s hands.
- Jun helped Aozumi awaken a dual-weapon Shikai inspired by the story of Lady Yae Sakura, then discovered Kaname Tōsen hiding near Tachikawa Jin’s wedding procession.
- Jun revealed the Tachikawa Family’s human-sacrifice method to Kakyō and urged her to pursue justice through teaching, but Central 46 later had her killed, prompting hundreds of thousands of Rukongai residents to besiege Seireitei.
- Jun and his allies faced a massive Hollow invasion, while he built a farming settlement in the World of the Living and brought Arrancar and Undead there to live alongside Soul Reapers.
- Genryūsai Yamamoto led Soul Society to victory against the Hollow army, though the expedition suffered heavy losses, and his attempt to defeat Baraggan later failed against Respira.
- Jun stopped Kuruyashiki Kenpachi and Sōya Azashiro’s duel, brought them together with Arrancar, and persuaded Azashiro to return to Soul Society as Kenpachi after Kuruyashiki died.
- Jun investigated the use of Hollow power to advance Soul Reapers, but an altered expedition order sent Isuzu into the Forest of Menos, where he found her dying and learned Higashiyama had arranged the attack.
- Isuzu asked Jun to keep pursuing his ambitions, merged with the blue-ribbon sword, and became a Hollow, and Jun left her with Oka and refused to return to Soul Society until ordered to lead the Tenth Division.
- Jun appointed Shūsuke Amagai as expedition leader, demonstrated Clear Rain Eradicates Sin to the captains, and took command of the Tenth Division.