Arc 4The Kusanagi Heir
Uya joined the war in the Land of Rain, survived the destruction of his squad, and grew into a powerful special Anbu while befriending Yahiko and Konan. After claiming the Kusanagi Sword and uncovering his clan identity, he left to rescue Tsunade and faced an approaching Iwagakure force alone.
- Guren Gekko led Uya, Ino Yamanaka, and Sana Asama into the Land of Rain, where an Iwagakure trap killed him and Uya annihilated the enemy unit that attacked his squad.
- Hiruzen Sarutobi assigned Uya to the Anbu Special Force as Ten'u, and Uya trained in Kumogakure’s Lightning Body Tempering Secret Technique before beginning another mission in the Land of Rain.
- Uya rejected Danzo’s attempt to seize control of him, killed Nara Shikachi and Kurama Yasō, and later met Yahiko and Konan while they were fleeing after stealing bread.
- Uya protected Yahiko and Konan from a Sunagakure unit, settled with them in a secluded cabin, and began teaching them Ninjutsu as they trained together.
- Uya defeated Senjin, claimed the Kusanagi Sword, and revealed himself as Kusanagi Yoru before killing Senjin when he threatened Yahiko and Konan.
- After receiving word that Tsunade’s squad was trapped by Iwagakure, Uya left Yahiko and Konan and raced to rescue her as Hyuga Ushin sacrificed himself to help her escape.
- Uya caught the exhausted Tsunade and confronted the pursuing Stone Ninja alone, using the Kusanagi Sword to deflect their attacks as more than thirty enemies approached.