Chapter Summaries

Hidan and the other examiners overwhelmed the Public Security Department’s teams, leaving them with six losses and a harsh lesson in their limits. After the assessments, Kakashi recognized Rin Nohara, who had survived, and the two tearfully reunited while Kisame Hoshigaki watched in growing jealousy.

• Hidan used his curse to make Uchiha Inabi feel the pain of Hidan stabbing himself, then Kimimaro subdued Tokuma Hyuga and won the fourth assessment for the examiners.
• The examiners won the remaining assessments, including against two researchers who used White Zetsu Puppets as a mobile battle tank, leaving the student team with six losses.
• Kakashi rushed toward Rin Nohara, but Kisame Hoshigaki stepped in to block him until Rin told Kisame it was all right.
• Rin removed her mask, and Kakashi recognized her as the friend he had believed dead; they embraced and wept together.
• Kisame watched Kakashi hold Rin and grew angry and jealous, gripping Samehada as he regarded Kakashi as a rival.

Rin Nohara told Kakashi how Kirigakure made her a Three-Tails Jinchūriki and planted a curse tag to force her to destroy Konoha. Senju Chen rescued her and later removed the curse, but Rin chose to stay away to protect the village from Kirigakure.

• Rin explained that Kirigakure abducted her, sealed Isobu inside her, and planted a curse tag linked to her heart and soul.
• Rin told Kakashi that Senju Chen rescued her from the cavern and brought her to Tsunade for treatment.
• Rin said Chen and Tsunade suppressed the Three-Tails and kept her supposed death secret while she recovered in hiding.
• Rin explained that Chen eventually found a way to remove the curse, but she stayed away because Kirigakure might hunt her and threaten Konoha.

Kakashi learned why Rin had stayed away from Konoha and apologized for misunderstanding her. Rin refused to return until she was strong enough to protect the village herself, while Kakashi accepted her choice and began looking toward the future.

• Kakashi broke down in tears after realizing Rin had stayed away to protect Konoha, and Rin comforted him.
• Rin told Kakashi that Chen-kun had helped her gain control of the Tailed Beast's power and become strong enough to protect herself and those she cared about.
• Kakashi asked Rin to return to Konoha, but she refused, saying she would return openly once she was strong enough not to be a burden.
• Kakashi accepted Rin's decision, apologized and thanked her, then addressed her as Senior 'Rin.'

Senju Chen ended the Public Security Department elites’ training and sent them back to Konoha with Amado to establish a medical institute and introduce Scientific Ninja Tools. He then revealed a secret fourth stage to Kabuto Yakushi, taking him to a chamber of Uzumaki God Masks and explaining the clan’s connection to beings from another world.

• Senju Chen told the elites their advanced training was over and assigned them to escort Amado and his equipment to Konoha.
• Senju Chen explained that Amado would establish a medical institute and promote Scientific Ninja Tools, while the graduates would teach their use in the village.
• Senju Chen asked Kabuto Yakushi to stay and revealed that a true fourth stage of training existed for him alone.
• Senju Chen led Kabuto through the base to a sealed chamber, where he described the Uzumaki Clan’s ancient role as shrine maidens and priests who communicated with gods.
• Senju Chen showed Kabuto twenty-seven God Masks and said he and his colleagues were studying them and seeking to control their power.

Kabuto Yakushi agreed to join Senju Chen and Orochimaru’s dangerous research into the God Masks, which aimed to understand and eventually surpass the gods they summoned. After learning about their permanent clones and the masks’ classifications, Kabuto witnessed a controlled summoning that left him captivated by the research.

• Senju Chen explained that White Zetsu could serve as sacrifices to summon gods and revealed their ambition to analyze, replace, or surpass them.
• Senju Chen warned Kabuto Yakushi that the research could drive people insane, but Kabuto eagerly asked to join.
• Kabuto met two Orochimarus and learned that one was a permanent, independent clone, then discovered Senju Chen was also a clone whose original body remained in Konoha.
• Senju Chen introduced the God Masks, described their categories and powers, and showed Kabuto how the researchers studied them.
• Kabuto watched the Takehaya Susanoo-no-Mikoto Mask summon a wind god inside a protected formation while White Zetsu Clones were consumed and instruments analyzed the entity.

Senju Chen thanked Kakashi for his trust but tasked him with protecting Naruto and growing strong enough to fight beside him. Meanwhile, Chen used Kurama Yakumo’s Soul Mutation talent to break through his mental power bottleneck and began moving objects with his mind.

• Kakashi thanked Senju Chen for saving his father and Rin, then asked to join the Public Security Department.
• Senju Chen asked Kakashi to protect Naruto instead, and Kakashi accepted the responsibility and vowed to grow stronger.
• Senju Chen demonstrated that he could control a kunai with his mental power and strike a target from over ten meters away.
• Senju Chen recalled extracting and equipping Kurama Yakumo’s Soul Mutation talent during an outing two weeks earlier.
• Senju Chen’s Spirit Transformation Technique reached great mastery, allowing his soul to leave his body and potentially invade another person’s mental world.

Senju Chen replaced his Transformation Technique skill with Kurama Yakumo’s Soul Mutation and planned how to introduce Amado’s researchers and technology to Konoha. Tsunade approved a public medical facility in the village and a hidden research center in Orochimaru’s former underground base.

• Senju Chen replaced Transformation Technique (Top-Level) with Soul Mutation (Top-Level), gaining a talent that could raise his mental-power limit as he aged.
• A clone at the experimental base reported that the first group had finished advanced training, so Senju Chen prepared for Amado’s arrival.
• Senju Chen planned to showcase medical treatment and rehabilitation at a public Medical Department in Konoha while keeping research and production at a secret underground base outside the village.
• Senju Chen told Tsunade that he wanted the public facility to handle treatment and recovery while the hidden base handled supplies and Scientific Ninja Tool research.
• Tsunade approved Senju Chen’s plan and offered him whatever personnel and supplies he needed.

Shisui Uchiha led Amado and the Public Security Department team back to Konoha and into Senju Chen’s hidden underground base. Senju Chen named the newly equipped facility the Hive, where Amado and his assistants began installing its advanced machinery.

• Shisui Uchiha and Uchiha Itachi killed three Iwagakure scouts who tried to ambush the traveling party.
• Shisui changed the party’s route and led them to a concealed entrance in a secluded valley outside Konoha.
• Senju Chen welcomed Amado and confirmed that he had brought the equipment and instruments sealed in scrolls.
• Senju Chen led the group into the renovated underground facility and named it the Hive, the technological heart of the Public Security Department.
• Shisui Uchiha and Yamato directed the team in releasing the machinery from their sealing scrolls.
• Amado and his research assistants began installing and calibrating the equipment as the ninja watched.

Senju Chen brought Amado to Konoha and introduced him to the village’s senior leadership as the chief technical advisor of his Medical Department. Amado demonstrated a chakra-responsive mechanical arm, leaving Tsunade impressed but the elders unable to understand his technology.

• Shisui Uchiha, Kakashi, Yamato, and Amado entered Konoha with sealed crates of equipment for the Public Security Department and Medical Department.
• Senju Chen directed Shisui to deliver medical equipment and took Yamato and Amado to meet Tsunade and the village leadership.
• Utatane Koharu and Mitokado Homura demanded Amado’s technical documents and proposed monitoring his research, but Tsunade objected.
• Amado challenged the elders’ ability to understand his research and demonstrated a mechanical prosthetic arm with chakra-sensing nodes and a neural interface.
• Shikaku Nara recognized the prosthetic’s potential, while noting that it differed from Maruboshi Kosuke’s demonstrated limb regeneration.

Amado demonstrated the G-01 Tactical Prosthesis, whose weapons and capabilities alarmed Konoha’s leaders and prompted them to call it an advanced Puppet Technique. After Tsunade calmed the argument, she asked whether Amado could also regenerate limbs as he had for Maruboshi Kosuke.

• Amado showed the prosthesis’s Chakra Scalpels, chakra cannon, storage compartment, and automated hand-seal functions.
• Hiruzen Sarutobi feared that mass-produced prostheses could drastically increase ninja combat strength.
• Shikaku Nara called the device an advanced form of Puppet Technique, and Mitokado Homura and Utatane Koharu accused Amado of offering puppet arms instead of limb regeneration.
• Amado angrily insulted the elders for comparing his masterpiece to Puppet Technique and called them primitives.
• Tsunade defended Amado’s work, reprimanded the advisers, and asked whether he could perform the limb regeneration used on Maruboshi Kosuke.

Amado prepared to demonstrate limb regeneration at Konoha’s new Medical Department, prompting Hiruzen Sarutobi to arrange a public operation on Sarutobi Hazuki. As the elders watched from an observation room, Amado prepared a cultivated replacement arm and began surgery preparations.

• Amado said limb regeneration was simple for him and agreed to begin work at the Medical Department.
• Hiruzen Sarutobi arranged a public treatment for the next day, choosing Sarutobi Hazuki, who had lost his right arm in the Third Shinobi World War.
• Utatane Koharu and Mitokado Homura demanded to watch the operation, and Senju Chen explained that they would observe through a one-way window.
• Amado examined a replacement arm cultivated from White Zetsu material and Sarutobi Hazuki’s cells, then ordered his staff to prepare for surgery.

Amado’s automated operating room restored Sarutobi Hazuki’s right arm in minutes, astonishing Konoha’s leaders with machines that performed precise surgery and used the Mystical Palm Technique. As Hazuki recovered, the elders began imagining military uses for the technology, while Senju Chen declared that it was the start of an industrial revolution.

• Sarutobi Hazuki was anesthetized and placed on the operating bed while Konoha’s leaders watched from the observation room.
• Amado’s mechanical arms scanned Hazuki, prepared the replacement arm, and connected nerves, blood vessels, and muscle tissue.
• A mechanical arm used the Mystical Palm Technique to heal the surgical site, leaving Hazuki with a restored right arm.
• Hazuki woke, moved his new arm, and confirmed that chakra flowed through it without obstruction.
• Hiruzen Sarutobi celebrated the successful operation, while Utatane Koharu and Mitokado Homura contemplated keeping the technology for Konoha’s military.
• Senju Chen told the group that Amado’s work was the beginning of an industrial revolution across the Shinobi World.

Sarutobi Hazuki successfully used chakra through his new biological arm, impressing Konoha’s leaders. Amado explained that the limb had been made through scientific processes rather than ninjutsu, and he began detailing the procedure.

• Sarutobi Hazuki tested his new arm’s movement and formed a steady Chakra Scalpel with it.
• Hiruzen Sarutobi and Utatane Koharu celebrated the successful prosthesis, while Shikaku Nara grew uneasy about the leaders’ reaction.
• Amado instructed Sarutobi Hazuki to undergo seventy-two hours of neural monitoring and rehabilitation before leaving with a medical assistant.
• Utatane Koharu and Mitokado Homura praised Amado, and Hiruzen Sarutobi asked whether his work was advanced medical ninjutsu.
• Amado rejected the term ninjutsu and explained the data collection, tissue printing, and neural bridging used to create and attach the arm.

Amado explained that Konoha could not reproduce his advanced medical technology without Senju Chen’s special materials and a modern scientific education, leaving the village dependent on them. Senju Chen then moved the discussion toward the tactical prosthesis and other scientific ninja tools.

• Amado explained that the prostheses relied on specialized machines and cells supplied by Senju Chen.
• Amado estimated that Konoha would need decades to understand the technology and perhaps a hundred years to operate and maintain it independently.
• Hiruzen Sarutobi and the elders realized Konoha would remain dependent on Senju Chen and Amado to use the technology.
• Senju Chen ended the medical tour and introduced the G-01 Tactical Prosthesis and other scientific ninja tools.

Senju Chen demonstrated a chakra-powered Gatling that let Yamato destroy ten heavily armored targets without spending his own chakra. He then began a second test, with Kakashi facing fifty automated turrets to demonstrate the defensive capabilities of his equipment.

• Senju Chen brought the senior officials to the Public Security Department's underground tactical testing ground and introduced a demonstration of shinobi equipment.
• Yamato used the chakra-powered Gatling to pulverize ten high-strength defensive dummies in less than twenty seconds.
• Senju Chen explained that the Gatling ran on chakra stored in its backpack, and Yamato confirmed that firing it consumed none of his personal chakra.
• Senju Chen called Kakashi forward to demonstrate a defensive device, and fifty automated turrets aimed at him.

Senju Chen demonstrated an array of scientific ninja tools to Konoha's senior officials, showing how they could deflect attacks, detect and destroy hidden targets, and amplify physical strength. The chapter ended with Tsunade punching a deep dent into a half-meter-thick steel plate while wearing the Power Amplification Gauntlet.

• Kakashi survived a barrage of senbon when the Inertial Deflection Armor Belt bent their trajectories away from him.
• Shisui Uchiha and Uchiha Itachi used a reconnaissance drone, Sonic Vibration Blade, and Chakra Landmine to destroy ten concealed targets.
• Senju Chen had Public Security Department personnel demonstrate additional scientific ninja tools, including a flight pack, Chakra Cannon, and Chakra Converter.
• Senju Chen invited Tsunade to test the Power Amplification Gauntlet, and she punched a deep imprint into a half-meter-thick steel plate without using chakra.

Senju Chen demonstrated Scientific Ninja Tools that could transform warfare, then negotiated funding and control for their development and deployment. Hiruzen Sarutobi and Tsunade approved his proposals, leaving the Public Security Department with independent authority to equip its forces and a large share of village funding.

• Shikaku Nara recognized that Amado's drones, armor, weapons, and mines could upend shinobi warfare and give Konoha a decisive advantage.
• Senju Chen argued that production was limited and proposed making the Public Security Department the sole force to test and use the new equipment.
• Senju Chen demanded thirty percent of the village's annual fiscal expenditure for the Public Security and Medical Departments, with control over its distribution and no Elder Council audits.
• Shikaku Nara judged that the investment would pay off if it reduced casualties and increased mission success, and Hiruzen Sarutobi agreed to thirty percent of military expenditure and independent equipment authority for the Public Security Department.
• Tsunade approved the arrangement, saying she trusted Senju Chen, and he promised Konoha a hundredfold return.

Senju Chen secured Konoha’s agreement to fund Scientific Ninja Tools and keep the first batch with the Public Security Department for testing. He proposed training Anbu members for later deployment, while privately planning to make the village dependent on the tools rather than truly teach them how they worked.

• Senju Chen explained that he had demanded a large share of the village budget so Konoha’s leaders would value and protect their investment in Scientific Ninja Tools.
• Senju Chen argued that the first batch should go to the Public Security Department because its members already understood the equipment and could test it in the field.
• Senju Chen offered fifty Anbu training slots, with Amado preparing teaching materials and Public Security Department members serving as instructors.
• Hiruzen Sarutobi and the elders approved the plan, and Mitokado Homura asked Tsunade to finalize the Anbu candidates.
• After the elders left, Amado questioned whether they could understand his materials, and Senju Chen revealed that he intended to make Konoha dependent on the tools.

Senju Chen planned to reshape Konoha by teaching science and technology from the Ninja Academy onward, while Kakashi returned from special training transformed and faced Might Guy in a match. The chapter ended with Guy opening the Third Gate and launching the Reverse Lotus.

• Senju Chen revealed his plan to introduce science and technology into Konoha's curriculum, starting with its children.
• Senju Chen dismissed Amado's boast about blowing up the moon and sent him to write lesson plans.
• Kakashi returned to Training Ground Three carrying White Fang and challenged Might Guy to their two-hundred-and-sixteenth match.
• Kakashi caught Guy's powerful kick with one hand and threw him away, astonishing him with his strength.
• Guy opened the Third Gate and attacked Kakashi with the Reverse Lotus.

Kakashi defeated Might Guy decisively in their 216th duel using lightning-coated swordsmanship without revealing his Sharingan. After Kakashi said Senju Chen had introduced him to science, Guy set out to find Chen and get stronger himself.

• Kakashi used lightning-coated sword strikes to counter Guy's attacks and stopped his blade just short of Guy's throat.
• Kakashi declared that he had won their 216th match, leaving Guy shocked by how thoroughly he had been outclassed.
• Guy demanded to know where Kakashi had trained, and Kakashi said Chen believed Konoha needed science.
• Guy mistook science for a person or evil force and asked where he could challenge it, so Kakashi told him to find Chen.
• Guy concluded that Senju Chen had given Kakashi extra help and raced toward the Public Security Department to ask Chen to make him stronger.