Recaps

Katsuo pursued power through relentless training, gained allies and protection within the Uchiha clan, and awakened a Three-Tomoe Sharingan. The arc left him stronger and able to enforce his will at the Academy, while his preparations for the coming war continued.

• Katsuo recovered his father’s unpaid 12,000 ryo from Uchiha Kari and secured a Ninja Academy nomination through Uchiha Kuiko and Uchiha Feng.
• Katsuo trained at a forest camp, merged memories of both sets of parents, and awakened a Two-Tomoe Sharingan.
• Katsuo burned and injured students in a fight with Uchiha Fugaku’s group, then used a genjutsu to knock Fugaku unconscious.
• Uchiha Feng protected Katsuo from clan punishment, and Uchiha Izumi became his guide and gave him 100,000 ryo.
• Katsuo began conditioning with Uchiha Izumi and Might Duy, becoming sworn brothers with Duy and enduring grueling exercises.
• Uchiha Izumi trained Katsuo’s eyes with a young ninja hawk, and after fifteen days of enduring its attacks, Katsuo awakened a Three-Tomoe Sharingan.
• Katsuo began body-tempering training with Old Duy and borrowed money through Uchiha Izumi for meals and supplies.
• Katsuo intimidated Hyuga Hiashi into paying Academy fees, while Kushina teased Uchiha Mikoto about her connection to Katsuo.

Katsuo’s drive to graduate early and become stronger led him to discover that the Body Tempering Elixir had damaged his body. He joined forces with Orochimaru to seek a cure at Mount Myōboku, where they found Toad Oil and learned of the rare Water of Life.

• Katsuo defeated Uchiha Feng in a spar, then received money from Uchiha Izumi after revealing his abilities.
• When Hiashi rallied students against Katsuo, Katsuo fought the Hyuga group and was sentenced to five days in detention, where he revealed his Three-Tomoe Sharingan to himself after resolving to rely on no one’s pity.
• Katsuo spared an infant after killing bandits, then sought Tsunade’s help when his body began to deteriorate and learned from Tsunade and Orochimaru that Body Tempering Elixir had damaged his blood-forming cells.
• Katsuo refused to give up, gained approval for early graduation, and challenged Hiruzen over the rules that kept Might Duy from becoming a Chunin.
• Katsuo confronted Orochimaru about using Hashirama Cells, trapped him with his Sharingan, and secured a secret bargain to seek a cure together.
• Orochimaru told Katsuo about Sage Dew at Mount Myōboku, and the two traveled there using a summoned toad.
• Katsuo and Orochimaru discovered Toad Oil at Mount Myōboku, and Katsuo learned that the Water of Life overflowed once every ten years.
• Katsuo and Orochimaru returned to Konoha with Toad Oil and decided to study it first as a possible cure for Katsuo’s damaged body.

Katsuo sabotaged the Chunin Exams, negotiated a path to promotion for his brother, and launched a newspaper agency while preparing for war. As he left for the Land of Rain, he gained medical training and learned to open the first four Eight Gates, but remained worried about his illness and survival.

• Katsuo stole Uchiha Kari’s eyes, giving the Sharingan to Orochimaru as payment while the Uchiha Clan searched for the attacker.
• Katsuo blocked the Death Forest tower, defeated several examinees including the Ino-Shika-Cho team, and burned the scrolls he took.
• Katsuo asked the Third Hokage to create a path for his brother’s promotion, and agreed to stay out of the Chunin Exams for ten years and seek forgiveness from six clans.
• Katsuo and Uchiha Feng established a privately named newspaper agency, and Mita Kishisuke persuaded the Third Hokage to fund and oversee it.
• Katsuo arranged to join Uchiha Sheng’s advance force to the Land of Rain and received Uchiha Feng’s treasured blade, Hidden Edge.
• Katsuo warned Kushina and Nawaki about the coming war, ordered Nawaki not to follow him, and said goodbye before departing.
• Orochimaru gave Katsuo purified Natural Energy, and Tsunade advanced his medical training after he revived a seemingly dead fish.
• Might Duy taught Katsuo the Eight Gates’ Chakra circulation method, and Katsuo opened the first four gates before reaching his physical limit.

Katsuo went to the Land of Rain to find Nagato, survived Hanzo and awakened the Mangekyō Sharingan after nearly dying inside Ibuse. He returned to Konoha with Konan, then joined Orochimaru in a plan to reach Mount Myōboku’s Sage Spring, leaving his eye damaged as he teleported toward it.

• Katsuo led Uchiha forces into the Land of Rain, where they attacked Sunagakure strongholds and he earned a promotion to Chunin.
• Katsuo traveled alone to seek a red-haired woman, but Hanzo tracked and confronted him, eventually feeding him to Ibuse.
• A girl rescued Katsuo, and his near-death experience awakened his Mangekyō Sharingan and Susanoo.
• Uchiha Sheng fought Hanzo and suffered heavy losses before Katsuo sent word that he was alive and later left with Konan.
• Katsuo returned to the battlefield and used Susanoo to kill Hanzo’s giant Ibuse, but the Mangekyō’s strain left his body near collapse.
• Katsuo and Orochimaru planned to reach Mount Myōboku’s Sage Spring, and Katsuo teleported toward it from a great distance despite the danger to his left eye.