Chapter Summaries

Sarutobi Toru began his first day at the Ninja Academy and set his sights on Orochimaru and Tsunade as allies for his plan to pursue immortality. He declared he would create the medical ninja profession, then started studying Chakra as the foundation for future research.

• Sarutobi Hiruzen addressed the new students, who were assigned to classes after his speech.
• Sarutobi Toru met Orochimaru and gave him a notebook on Chakra Refinement and Manipulation, deciding to befriend him.
• Sarutobi Toru identified Tsunade as another potential ally after hearing her ambition to surpass her grandfather.
• Sarutobi Toru told the class he wanted to become an immortal medical ninja and create the profession, surprising his teacher.
• Sarutobi Toru listened closely to the first lesson on Chakra Refinement, though the lecture offered little insight into Chakra's nature.

Five-year-old Sarutobi Toru trained at home and argued with Sarutobi Hiruzen for permission to focus on Medical Ninjutsu. Hiruzen agreed to support his research as long as Toru kept up his combat training, and Toru planned to follow Namikaze Minato’s path and become the first Sarutobi Flash.

• Toru practiced physical conditioning and his self-developed One Reed Crossing the River technique until Hiruzen startled him with the Body Flicker Technique.
• Toru told Hiruzen he had met interesting classmates at school but wanted to develop Medical Ninjutsu rather than learn more elemental techniques.
• Toru argued that shinobi missions and wars revolved around money and that medical services could earn Konoha substantial income from wealthy clients.
• Toru explained that the demands of Medical Ninjutsu would keep its practitioners rare, persuading Hiruzen to support his research while requiring him to maintain combat training.
• Toru declared that he would model his combat path on Namikaze Minato, using his aptitude for space-time techniques and the Rasengan to become the first Sarutobi Flash.

Sarutobi Toru opened the Reincarnation Warehouse sealed inside the Main God Fragment and discovered a collection of powerful but dangerously flawed treasures. He reached for a Devil Fruit, hoping it would be useful, but its identity remained unknown.

• Sarutobi Toru used Chakra to fully open the Reincarnation Warehouse and entered it.
• Sarutobi Toru learned that the Heavenly Crystal Sword could only be wielded by someone benevolent and would self-destruct if its master developed evil thoughts.
• Sarutobi Toru found that Mjolnir, the Flying Nimbus, the Stand Arrow, the T-virus, and Super God Water were unusable or dangerous.
• Sarutobi Toru rejected the Sunflower Manual, the Book of the Dead, and the trap-filled Martial Scripture and Dao Scripture.
• Sarutobi Toru recognized a likely imitation Infinity Gauntlet and prayed that the Devil Fruit would grant a useful ability before reaching for it.

Sarutobi Toru ate the Hormone Fruit and spent a year developing his body and ninja skills. At the Academy, Jiraiya accidentally disrupted Orochimaru’s Shadow Clone, causing Orochimaru to fall into the water during training.

• Sarutobi Toru ate the Hormone Fruit and discovered he could control and secrete hormones, while his phone contained real-world technology and media.
• A year later, Jiraiya fought Orochimaru in an Academy spar and bit his hand, only to discover he had attacked a Shadow Clone.
• Orochimaru’s Shadow Clone vanished, leaving Jiraiya and the instructor astonished that Orochimaru could use the technique at six years old.
• Sarutobi Toru trained at Training Ground 9 with Tsunade, Orochimaru, and Hiruko, using Shadow Clones to study and practice.
• Orochimaru fell into the water while practicing “Crossing Rivers on a Reed” because Jiraiya’s bite had disrupted his Shadow Clone and affected his main body.

Sarutobi Toru persuaded Jiraiya to join the group as a ninjutsu tester and offered to teach him the Shadow Clone Jutsu. After Orochimaru defeated Jiraiya again, Sarutobi Toru began instructing him in the technique.

• Tsunade mocked Orochimaru after Jiraiya knocked him into the water.
• Jiraiya tracked Sarutobi Toru and his friends to the Ninth Training Ground and demanded to train with them and challenge Orochimaru.
• Sarutobi Toru used his hormones to calm Jiraiya and convinced him to become their ninjutsu tester.
• Orochimaru defeated Jiraiya and pinned him beneath a mound of earth.
• Sarutobi Toru freed Jiraiya and promised to teach him the Shadow Clone Jutsu, then began explaining it.

Sarutobi Toru accompanied Tsunade to the Senju Estate to study the First and Second Hokage’s medical ninjutsu research. He found Hashirama’s work powerful but incomplete, while Tobirama’s materials offered practical techniques and clear principles for ordinary people to learn.

• Jiraiya learned the Shadow Clone Jutsu, while Orochimaru privately anticipated the consequences of testing it.
• Tsunade brought Sarutobi Toru to the Senju Estate to see the medical ninjutsu research materials.
• Toru met Tsunade’s parents, Senju Yusuke and Senju Miki, and told Yusuke that healing people was the true purpose of chakra.
• Yusuke reflected on Toru’s words and wondered whether the boy resembled Hashirama or Tobirama more.
• Toru studied the Hokage research and found Hashirama’s notes fragmentary but Tobirama’s work detailed and teachable.

Sarutobi Toru asked Sarutobi Hiruzen for funding, a laboratory, medical equipment, and volunteers, then demonstrated a potion that greatly enhanced a ninja’s abilities. Yan Xiao tested it and confirmed its powerful effects, leaving Sarutobi Hiruzen eager to learn whether it had any side effects.

• Sarutobi Toru carried the sleeping Little Tsunade from the research room, and she revealed she had been awake before hurrying home on her own.
• Sarutobi Toru found Sarutobi Hiruzen working late and suggested he use Shadow Clones to handle paperwork.
• Sarutobi Toru explained that his Medical Ninjutsu research had reached a bottleneck and requested a laboratory, equipment, and volunteers.
• Sarutobi Toru showed Sarutobi Hiruzen Super Adrenaline and a blue pill, describing the red potion’s temporary boost and recovery cost.
• Sarutobi Hiruzen ordered Yan Xiao to test the potion, and Yan Xiao reported greatly increased strength, speed, Chakra, and concentration without immediate abnormalities.

Sarutobi Toru presented Sarutobi Hiruzen with Super Adrenaline and an aphrodisiac pill, then sparred with him at the Training Ground. The spar ended with Sarutobi Hiruzen’s Shadow Clone holding a kunai to Toru’s back.

• Yan Xiao tested Super Adrenaline and reported that it drained his Chakra and physical strength, so Sarutobi Hiruzen sent him away to recover.
• Sarutobi Toru explained the medicine’s costs and limits, and Sarutobi Hiruzen agreed to restrict its use by Genin and ninjas under sixteen.
• Sarutobi Toru revealed that the Blue Pill was an aphrodisiac and argued it could earn Konoha substantial revenue.
• Sarutobi Toru handed Sarutobi Hiruzen the formulas, and Sarutobi Hiruzen took him to the Training Ground to test his progress.
• Sarutobi Toru attacked with kunai and evaded several techniques, but Sarutobi Hiruzen’s Shadow Clone caught him from behind and pressed a kunai to his back.

Sarutobi Toru revealed that his new Speed Chakra Mode greatly boosted his speed and reflexes, and Sarutobi Hiruzen agreed to support his research in exchange for recording the technique in the Scroll of Sealing. Later, Toru trained in the Reincarnation Warehouse, where the Heavenly Crystal helped him recover quickly and extend his training.

• Sarutobi Hiruzen praised Sarutobi Toru's strength after their battle, but was shocked by how fast Toru had moved.
• Sarutobi Toru explained that Speed Chakra Mode was a Chakra-modified Sunflower Manual that enhanced speed and reactions but risked Yang Excess without medicine.
• Toru said his medicine only worked for himself so far, and Sarutobi Hiruzen offered to provide experimental equipment and count the technique's registration in the Scroll of Sealing as an S-rank mission.
• Sarutobi Toru accepted the offer and looked forward to choosing a technique from the Scroll of Sealing, including Flying Thunder God, Spirit Transformation Technique, or Impure World Reincarnation.
• In the Reincarnation Warehouse, Sarutobi Toru recovered Chakra while ten Shadow Clones studied and trained, using the Heavenly Crystal's energy to reduce fatigue and increase his training time.

At the Ninja Academy, Jiraiya learned he would be teamed with Tsunade and Orochimaru, while Sarutobi Toru tested his newly completed Perfect Development Potion on Hiruko. Hiruko woke after the experiment, leaving Toru ready to assess the results and expand the potion’s use.

• Tsunade told Jiraiya that she, Jiraiya, and Orochimaru had been assigned to the same class under Sarutobi Hiruzen, while Sarutobi Toru had been placed elsewhere.
• Tsunade threatened to take over Toru’s role in training Jiraiya, who recalled how Toru had healed him and brought him nourishing soups after the tests.
• Sarutobi Toru completed the Perfect Development Potion with Hiruko’s help and secretly added hormones tailored to Hiruko’s body before handing him the test tube.
• Hiruko drank the potion, collapsed, and remained unconscious as Toru estimated how long it would take him to recover and considered the potion’s effects and cost.
• Hiruko groaned and woke up, ending the experiment’s first trial.

Sarutobi Toru completed the Perfect Development Potion, which greatly increased Hiruko’s Chakra, and revealed its success to Danzo. Danzo classified the potion as a top village secret and hurried Toru and the others to the Hokage Building, while Toru recognized the quiet white-haired ninja accompanying them.

• Sarutobi Toru told Hiruko that the potion had increased his Chakra by 92 percent, though his strength still fell short of the Sannin’s.
• Danzo arrived with a white-haired child ninja and asked whether Sarutobi Toru had finished his experiment.
• Sarutobi Toru gave Danzo the potion’s formula and explained its effects, while Hiruko confirmed his increased Chakra and improved physical abilities.
• Danzo declared the potion Konoha’s highest secret and ordered Sarutobi Toru, Hiruko, and the white-haired ninja to go with him.
• Sarutobi Toru told Danzo that Tsunade and Orochimaru had helped develop the potion and that Jiraiya’s Chakra had also increased through experiments.
• Danzo, Sarutobi Toru, Hiruko, and the white-haired ninja hurried across the rooftops toward the Hokage Building.

Sarutobi Toru presented the Perfect Development Potion to Sarutobi Hiruzen and explained its high cost and limited effectiveness. Hiruzen stored the formula in the Scroll of Sealing and offered Toru two ninjutsu, which Toru chose at the end of the chapter.

• Shimura Danzō brought Sarutobi Toru and the others to the Hokage's Office to report Toru's new potion, and Sarutobi Hiruzen dismissed the Anbu to hear the secret.
• Sarutobi Toru explained that the Perfect Development Potion cost six million ryo per dose, worked best on young ninja, and could increase a six-year-old's Chakra by fifty percent or up to eighty percent in a customized dose.
• Sarutobi Hiruzen summoned Orochimaru and Tsunade, then approved public funds for customized doses and awarded Toru, Orochimaru, Tsunade, and Hiruko an S-rank mission.
• Shimura Danzō offered to pay for both his potion and Hatake Sakumo's, and Sarutobi Hiruzen decided to store the potion formula in the Scroll of Sealing.
• Sarutobi Hiruzen gave Sarutobi Toru the chance to choose two ninjutsu, and Toru selected them from the Scroll of Sealing.

Sarutobi Toru copied the Spirit Transformation Technique and planned to use Orochimaru to test its dangers while he pursued his research. He later gave Tsunade a specially tailored treatment that left her unconscious for two days, and she awoke with nearly ten times her former chakra.

• Sarutobi Toru chose the Spirit Transformation Technique and the Akimichi Clan's Expansion Jutsu from the Scroll of Sealing, planning to study soul ejection and have Orochimaru test the Dao Scripture of the Yang God.
• Sarutobi Hiruzen persuaded Danzo to take Toru on missions so he could gain experience before other countries learned of his abilities.
• One week later, Toru reviewed chakra growth results and told Tsunade that her treatment would use a more advanced formula than the others'.
• Toru injected Tsunade with the medicine and permanently altered her hormones while she slept through the treatment.
• Tsunade woke after two days, struck Jiraiya when she saw him, and discovered her chakra had risen to nearly ten times its previous amount.

After Tsunade’s recovery greatly increased her abilities, she gave Toru the Flying Thunder God Technique, which he mastered before his first mission outside Konoha. Toru, Danzo, Hiruko, and Hatake Sakumo reached the Capital of Fire, where Danzo went to secure the Daimyo’s signature on the Third Hokage’s succession.

• Tsunade’s tests showed that her physical abilities, Chakra reserves, vitality, and recovery had grown dramatically, and she offered Toru the Flying Thunder God Technique as thanks.
• More than a month later, Toru mastered the Flying Thunder God Technique at Training Ground No. 9.
• Danzo took Toru, Hiruko, and Hatake Sakumo on a B-rank mission to obtain the Daimyo’s signature confirming the Third Hokage’s succession.
• After reaching the Capital of Fire, Danzo went to the Daimyo’s Mansion and told the three young ninja to gather at the city gate in an hour.
• Toru declined Hiruko’s invitation to eat, said he wanted to investigate the capital, and gave Hiruko and Sakumo two hundred thousand ryō to spend.

Sarutobi Toru, Hatake Sakumo, Hiruko, and Danzo were ambushed by bounty hunters who had been given a detailed map of their route. After the team defeated the attackers, Sakumo found the map and suspected there was a spy in Konoha.

• Hatake Sakumo accepted Sarutobi Toru's money as a loan, and Sarutobi Toru resumed his economic survey before rejoining the group at the city gate.
• Bounty hunters studied a map of the team's route and agreed to attack the Konoha ninja for a 20 million ryo reward.
• An explosive tag detonated near Danzo, and the bounty hunters ambushed the team, targeting Hiruko while others engaged Sarutobi Toru and Hatake Sakumo.
• Sarutobi Toru killed one attacker and used the Flying Thunder God Technique to kill two fleeing bounty hunters, while Hatake Sakumo cut down another.
• Danzo revealed that he had staged the ambush to test his disciples, and Sarutobi Toru gave Hiruko an antidote after he had been poisoned.
• Hatake Sakumo found a map marked with their exact travel route and told Danzo he suspected there was a spy in Konoha.

After returning from a mission, Sarutobi Toru gained Danzo’s approval to follow a flexible mission schedule while developing medical ninjutsu and medicines alongside Tsunade. Six years later, Toru faced Hatake Sakumo and Hiruko in Root’s training ground and stopped their combined attack, though Sakumo’s blade cut his hand.

• Sarutobi Toru urged Danzo, Sakumo, and Hiruko to return to Konoha, and Danzo agreed after recognizing Toru had seen through his staged test.
• Danzo and Hiruzen discussed Toru’s place in Root, settling on a nominal position that gave Root priority access to his research results.
• Danzo let Toru take high-rank missions on a schedule that protected his research time, and Toru, Sakumo, and Hiruko later defeated two Cloud Shinobi Jōnin and a rogue ninja.
• Toru and Tsunade developed advanced Medical Ninjutsu and new medicines as six years passed.
• Twelve-year-old Toru blocked Hiruko’s wind blades and caught Sakumo’s short blade, but the blade cut his hand.

Sarutobi Toru continued developing his Reverse-Attribute Defense and advised Hatake Sakumo to ask Danzo for a chakra short sword. Back at his laboratory, Toru caught Might Duy overtraining with a dangerous method and imposed strict limits on his practice.

• Sarutobi Toru said his Reverse-Attribute Defense was still short of his goal, while Hiruko marveled at its power.
• Sarutobi Toru suggested Hatake Sakumo ask Danzo for a chakra short sword, and explained that Sakumo had inherited Danzo's essential teachings.
• Sarutobi Toru returned to his laboratory with Hiruko and found Might Duy practicing a dangerous training method.
• Sarutobi Toru warned Duy that overtraining could cripple or kill him and limited the method to one hour a day.
• Sarutobi Toru said someone would record Duy's training and threatened to withhold the next stage of the technique if he disobeyed.

Sarutobi Toru examined Might Duy’s progress in the Yang God Martial Way and continued researching Hashirama Cells at Konoha Hospital. He had developed an expensive Healing Potion but could not make it practical enough to support his plans for martial arts cultivation.

• Hiruko examined Might Duy and found signs of tendon overtraining, so Sarutobi Toru told him to reduce the intensity of those exercises.
• Might Duy enthusiastically accepted the advice and left the examination bed, prompting helpless reactions from Sarutobi Toru and Hiruko.
• Sarutobi Toru returned to Konoha Hospital, where his medical work and research supported the village’s growing hospital and medical program.
• At the underground laboratory, Sarutobi Toru dispelled a clone studying Hashirama Cells and realized that the Sage Body was difficult to reproduce.
• Sarutobi Toru explained that Hashirama Cell extracts could temporarily grant powerful healing, but the costly potion’s production depended on cultivating the cells and could not help him cultivate the Yang God Martial Way.

Sarutobi Toru considered Sage Jutsu as a possible route to longevity and decided to begin researching the Yang God Martial Way with Duy. After Tsunade returned from a mission, she reunited with Toru, while his plans to make her Head of the Medical Department continued to take shape.

• Sarutobi Toru weighed the Shinobi World's longevity methods and chose to research the Yang God Martial Way up to the Martial Saint realm.
• Tsunade, Jiraiya, and Orochimaru returned to Konoha after a mission, and Tsunade warned Jiraiya not to tell Toru about her gambling.
• The team reported their Class A mission to Sarutobi Hiruzen, who said Orochimaru and Jiraiya might be ready for promotion to Special Jōnin.
• Sarutobi Toru returned to his apartment and found Tsunade waiting with dinner.
• Tsunade told Toru about her mission and leaned against him, while the narration revealed that Toru had helped her gain credit for Medical Ninjutsu so she could lead the Medical Department.

Sarutobi Toru finished developing a groundbreaking but costly Healing Potion and learned that Konoha had selected him and other elite Genin for its first Joint Chunin Exam. As the exam began, the Five Great Shinobi Villages prepared their young competitors to face one another for a 300 million ryō prize.

• Sarutobi Toru told Tsunade the Healing Potion was complete but too expensive for widespread use, and Tsunade reassured him that she did not blame him for researching Hashirama Cells.
• Danzo announced that Sarutobi Toru, Hatake Sakumo, Hiruko, Might Duy, Aburame Ryoma, and an Inuzuka girl would represent Konoha in the Joint Chunin Exam.
• Danzo explained that Konoha needed Root's secretive young ninja to demonstrate the village's strength, and he forbade Sarutobi Toru from using Flying Thunder God or Lightning Release Chakra Mode.
• The leaders of Kumogakure, Kirigakure, Iwagakure, and Sunagakure selected young ninja for the exam and urged them to compete well for the prize.
• Three months passed, and the Chunin Exam began.