Shu Furukawa

Biodata

Feature	Detail
Name	Shu Furukawa 2
Alias	None
Species	Human 1
Gender	Male 3
Affiliation	Konohagakure (Hidden Leaf Village) 13 16 20
Clan	Furukawa Clan 2
Rank	Genin (during the Joint Chunin Exams), later promoted to Chunin (appears in chunin casual wear by Chapter 46) 20 21 46
Status	Alive 47 50
First Appearance	Chapter 1: Eccentric and Genius 1

Background

Shu Furukawa arrived in the world with no memory of his birth parents. Instead, he was taken in and raised by a young couple, Ichiro and Aoi Furukawa, who were only twenty-two years old at the time of their deaths. They were ninjas of Konohagakure, and they poured all their love and ambition into their adopted son. Ichiro, a jonin, dreamed of revitalizing the Furukawa Clan and once bragged to his wife that Hatake Sakumo would recommend him for promotion after his next mission. Aoi, in turn, cherished the quiet hope of leaving active duty to join the Medical Corps, where she could watch Shu grow up in peace. Their home was filled with warmth and laughter — Ichiro would proudly demonstrate the Shadow Clone Technique for Shu, and Aoi would dote on him, calling him a shy, cute child 2. They envisioned a bright future for him, hoping he would one day restore their clan's standing 2.

That future was shattered in early January of Konoha Year 42, when Ichiro and Aoi perished during a mission. Their deaths were a sacrifice made in the line of duty, but the loss left Shu Furukawa orphaned. The weight of the tragedy was compounded by the guilt felt by the mission's team leader, Jonin Takagi, who returned to the village and committed suicide less than a month later, unable to bear the emotional breakdown of witnessing his close friend's end 16. The nightmare of seeing his adoptive parents collapsed in pools of blood would haunt Shu Furukawa for years, waking him in the cold hours before dawn with gasping breath and a racing heart 2 15. Yet, it was also through this hellish process that he triggered his first "Collection," awakening the strange talent that would define his growth as a ninja 2.

In the wake of the Furukawas' death, the village's foremost hero, Hatake Sakumo — the White Fang of the Leaf — stepped in to offer guidance and support. Sakumo had provided care to the families of the fallen genin, and he saw great potential in the orphaned boy. At the Ninja Academy's opening ceremony, Sakumo rubbed Shu's head and declared to the homeroom teacher, Ryosuke Kimura, that "Shu's talent for ninjutsu is even better than Kakashi's," a high compliment that surprised even the veteran instructor 1. Shu Furukawa, then only five years old — the same age as Sakumo's own son, Kakashi — responded with a perfectly measured mix of excitement and sincerity, already showing the composure of a mature soul 1 3.

The Furukawa couple's sacrifice had also left behind a legacy of ambition. Their memory drove Shu to plan for the future: he quickly decided to pursue medical ninjutsu, intending to enter the Konoha Hospital and build a stable, practical foundation for his career 2 3. His classmates, including the shy Shizune, noticed he was already studying medical notes during orientation 3. Meanwhile, his "cheat" ability — the power to collect and gain insights from ninjutsu and other sources — began to manifest more clearly, allowing him to improve his skills at an astonishing rate and fueling his curiosity about the deeper mysteries of chakra 2.

The tragedy also forged a bond between Shu and the Hatake household. Under Sakumo's gentle mentorship, Shu trained alongside Kakashi, and Sakumo would often praise Shu's progress while advising his own son not to rush his growth 8 13. This period of relative peace and happiness lasted for nearly two years, with the White Fang of the Leaf enjoying a reputation for flawless missions and the Furukawa orphan finding a semblance of family. However, the shadows of the ninja world were never far away. By early Konoha Year 44, the mounting pressure of a failed mission and the cruel betrayal of the comrades he had saved drove Hatake Sakumo to take his own life with his own short blade 15. Shu Furukawa, now seven, was the one who found Kakashi kneeling beside his father's body. He broke down in tears only after Shu arrived, and in the days that followed, Shu quietly picked up the White Fang Short Blade, strapped it back onto Kakashi's back, and urged him to carry it until he found his own answers 15.

The death of Sakumo was a second profound loss for Shu — another pillar removed from his young life. But it also crystallized his determination. He had seen the village suppress the news of Sakumo's suicide, allowing the White Fang to end his career as a hero, yet Kakashi's hollow questions lingered: "Which is more important, the mission or one's comrades? ... What exactly is the Will of Fire?" 15. Shu, having witnessed both the cruel consequences of sacrifice and the political maneuvering of the village, could only offer his own conviction: that close comrades were more important, and that was the choice the master had made 15.

By the time he entered his genin years, Shu Furukawa was already a figure of remarkable capability. Tsunade, one of the legendary Sannin, had officially taken him as her student after seeing his card skills on New Year's Day of Konoha Year 44, recognizing his talent and potential beyond his years 8. Under her tutelage, he continued to refine his medical ninjutsu, researched the nature of Kekkei Genkai and jinchuriki, and began the arduous path of mastering the Strength of a Hundred Seal and the Sage Technique of Shikkotsu Forest 13 23 30. His performance in the Joint Chunin Exams left rival villages stunned — he effortlessly defeated teams from smaller villages, crushed a Kumogakure team, and even spared the Sunagakure jonin Baki, who vowed to become his lifelong rival 20 21.

Yet the boy who had lost two sets of parents never forgot the horrors he had witnessed. He told Fugaku Uchiha, during a tour of the Uchiha compound, that the hatred left behind by war twisted the minds of ninjas until death became a form of relief. He spoke of a five-year-old child who had killed his own father out of jealousy and was immediately absorbed into Root 46. Shu Furukawa understood that the world of shinobi was one of light and darkness, and he was determined to seize enough power — chakra, knowledge, and influence — to protect those he considered his comrades from ever appearing on a battlefield again 49. The legacy of his adoptive parents, the Furukawa couple who had sacrificed everything for their village and their son, lived on in his every action, driving him to transcend the cruel cycles of the ninja world 2 49.

Personality

• Maturity and Emotional Stability: Possesses a mature soul from his past life, allowing him to handle social interactions and high-pressure situations with composure. He shows no psychological fluctuation toward killing, even in his first C-rank mission, and engages in serious political discussions with clan heads like Fugaku Uchiha without intimidation. 3 10 46
• Ambitious and Driven: Pursues grand goals from a young age—learning medical ninjutsu, mastering Sage Techniques, and seeking immortality through energy transcendence. He explicitly states wanting to "live better and protect some important people," but also harbors deeper ambitions about power and truth. 6 25 35
• Pragmatic and Calculating: Views problems through a lens of utility and efficiency. He advocates for Uchiha reforms not out of idealism but because they benefit the village's balance, and he bases major decisions (e.g., learning Fire Style) on tactical advantage. 30 46
• Respectful and Grateful: Consistently shows deference to his teachers, especially Tsunade, acknowledging that his strength comes from her guidance. He thanks benefactors properly, bows politely, and never forgets to acknowledge help received. 11 21 46
• Protective and Compassionate: Driven to protect his companions and innocents. He treats wounded soldiers with skill and patience, comforts the dying by closing their eyes, and intervenes to de-escalate conflicts before they turn violent. 26 47 50
• Reserved and Private: Keeps his inner struggles to himself, rarely showing vulnerability. He has recurring nightmares about his adoptive parents' deaths but discusses them with no one, and Tsunade notes he is "not cute at all" because he hides his emotions. 2 35 40
• Intelligent and Curious: Shows exceptional academic aptitude, researching Kekkei Genkai, jinchuriki, and the nature of chakra. He constantly seeks new knowledge—from medical scrolls to Sage techniques—and asks probing questions about the world's deeper mechanics. 30 35 42
• Charismatic and Influential: Earns recognition from the Sannin (Tsunade, Jiraiya, Orochimaru all praise or court him) and respect from peers and elders alike. He is described as "reliable" by classmates and is sought after for advice and collaboration. 3 11 32 50
• Efficient and Ruthless in Combat: Shows no mercy when provoked, dispatching enemies swiftly and without hesitation. He prioritizes mission success and can appear cold-blooded, as when he kills faking-death ninjas or defeats opponents with overwhelming speed and precision. 10 20 21
• Melancholic and Introspective: Beneath his composed exterior lies a sorrowful awareness of death and impermanence. He reflects on loss, has moments of sadness when encountering corpses, and admits that "living for too long doesn't seem like a happy thing" when discussing immortality. 26 50

Abilities

Collection Ability

Shu Furukawa possesses a unique innate ability termed "Collection," which functions as a passive skill that allows him to extract insights, training experience, and even physical enhancements from various sources. The ability is tied to a browser-game mechanic from his past life and primarily works on inanimate objects, plants, and possibly deceased individuals, but cannot normally collect from the living. By collecting from ninjutsu scrolls, weapons, or remnants of fallen ninja, Shu gains partial understanding of techniques, advancing his skill progression at an accelerated rate. The process also steadily increases his mental power and sensory range, and it gradually remodels his body at the cellular level, analogous to acquiring a "spirit root" for chakra cultivation. He has successfully collected from Earth, Water, Lightning, and later Fire and Wind nature transformations, as well as swordsmanship techniques attributed to the White Fang. The ability's secondary effect causes his body to absorb harvested experience directly into instinctive reactions, bypassing the normal learning curve.

• Absorbed Earth Release techniques such as Earth Shore Return and Earth Wall, and Water Release techniques like Water Formation Wall and Syrup Capture Jutsu, from scrolls left by his adoptive father, a jonin 2.
• Collected the Chidori technique's principles during his early training, allowing him to develop the lightning-based jutsu rapidly 9.
• Derived insights into the Strength of a Hundred Seal and began studying its application for accumulating senjutsu chakra 12 19.
• Strengthened his body continuously: by the time of the Chunin Exams, his chakra reserves were estimated at four times that of Kakashi Hatake, a prodigy of similar age 17.
• Used Collection to master the basic nature transformation of Fire Release, completing the Great Fireball Technique 30.
• Absorbed the White Fang's sword techniques, enabling him to wield a short blade with wind-attribute chakra effectively 26.
• The collection of plants yields "essence" components, used in pharmacology experiments to improve Military Ration Pills 7 30.

Medical Ninjutsu

Under the direct tutelage of Tsunade, Shu Furukawa develops into a prodigy of medical ninjutsu, gaining recognition even before his formal genin promotion. He learns advanced healing techniques, including the S-rank Strength of a Hundred Seal—an ancient method originating from the Sage of Six Paths' era that accumulates chakra over time. Shu applies medical ninjutsu in combat situations, often serving as both field medic and combatant, and he is adept at gathering intelligence during battles. His skills are highly sought after by veteran ninja, and he frequently treats serious injuries at the Konoha Hospital. He also engages in experimental research on Kekkei Genkai and jinchuriki chakra, working closely with Tsunade to understand the underlying principles of nature transformation and cellular activation.

• Mastered the first stage of the Strength of a Hundred Seal, planning to use it to store senjutsu chakra for future Sage Mode use 12 19.
• Improved Tsunade's Military Ration Pill formula, earning high praise from the Fifth Hokage 7.
• Treated a jonin from the Sarutobi Clan and his students, demonstrating professional composure and skill despite being a newly promoted genin 30.
• During joint missions, he acts as the team's primary medic, using the Healing Technique to treat external wounds while simultaneously monitoring battlefield threats 37.
• Intercepted a trace of Nine-Tails chakra from Minato Namikaze's wound, using Katsuyu's cooperation to preserve the sample for experimental verification 41.
• Conducted experiments on chakra essence and herbal compounds, pushing his understanding of chakra flow and cell activation 30 13.
• Advises other medical ninja in the Medical Corps, becoming Tsunade's representative and gathering talented young medics around him 37.

Nature Transformations

Shu Furukawa demonstrates proficiency in multiple chakra natures, having collected and trained in Earth, Water, Lightning, Fire, and Wind releases. He begins with the three basic attributes of water, earth, and lightning, but rapidly expands his repertoire through diligent practice and the Collection ability. His Water Release is particularly devastating, capable of turning the tide of entire battles with large-scale techniques. He also develops a signature Lightning Release technique, Chidori, which combines high-speed shape transformation with enhanced physical activation. His control over nature transformations allows him to adapt to various combat scenarios, often using elemental countertactics.

• Water Release: Uses Water Severing Wave, Water Colliding Wave—the latter creating a massive torrent that clears over half a battlefield of Sunagakure forces 19 50. Also employs basic techniques like Water Formation Wall and Syrup Capture Jutsu 2.
• Earth Release: Mastered Earth Wall, Earth Flow Split, Earth Shore Return, and Headhunter Jutsu 2 19 28. In combat, he creates stone pillars and barriers to control the battlefield.
• Lightning Release: Developed Chidori, a technique that generates a large amount of lightning chakra to stimulate his cells and then squeezes the activated cells to produce even greater power. He can release the full-power Chidori four times consecutively 9 17.
• Fire Release: Learned the Great Fireball Technique and uses Flame Bullet effectively, even while coordinating with traps 30 36.
• Wind Release: Infuses his short blade with wind-attribute chakra, applying the White Fang's swordsmanship techniques 26.

Sage Technique

Shu Furukawa becomes a contractor of Shikkotsu Forest, one of the three great sage regions, after signing a scroll with Katsuyu, the slug sage. He is taught the basics of the Sage Technique by Tsunade, though initial mastery eludes him. The natural energy of Shikkotsu Forest begins to remodel his cells at a fundamental level, reminiscent of Hashirama Senju's cellular composition. Katsuyu confirms that Shu's cells are being influenced by natural energy, which will eventually allow him to apply senjutsu chakra at the cellular level. He continues to train in sensing and resonating with nature energy, even attempting to use the Spirit Transformation Technique in parallel to accelerate the process.

• Signed the Shikkotsu Forest contract on his birthday, meeting Katsuyu's main body in the forest 23.
• Received the legacy scroll containing names of Senju and Uzumaki contractors 23.
• Tsunade explained that Katsuyu possesses physical activation surpassing human understanding, and some of her medical ninjutsu were inspired by the slug 23.
• Despite failing to master the Sage Technique initially, his body continued to adapt, and Katsuyu noted he was progressing quickly 25 27 30.
• During the war, he resonated with Katsuyu inside his own mind while attempting the Spirit Transformation Technique, causing a violent fluctuation that triggered a temporary sage state 42.
• Plans to use the Strength of a Hundred Seal to store senjutsu chakra, bypassing the difficulty of sensing natural energy 12 27.

Forbidden Techniques and Sealing Arts

Orochimaru personally offers Shu Furukawa the Spirit Transformation Technique, a forbidden jutsu that allows the user to detach their spirit body from their physical form. Shu accepts and begins to study the scroll, gradually making progress. Though he cannot yet fully detach his spirit, he masters the basics and uses it in conjunction with Katsuyu to attempt resonance and deepen his sage training. Additionally, Shu participates in missions involving tailed beasts and sealing techniques, including a joint operation with Minato Namikaze where he witnesses a Tailed Beast Bomb and later obtains a sample of Nine-Tails chakra.

• Briefly studied the Spirit Transformation Technique scroll provided by Orochimaru, keeping their arrangement secret 36.
• Achieved basic mastery, enough to attempt resonance with Katsuyu, but could not fully separate his spirit body 42.
• Collaborated with a Root-influenced Anbu captain and Minato Namikaze on a mission to handle tailed-beast related threats, learning about sealing arrays 39.
• Used Katsuyu to intercept Nine-Tails chakra from a wounded Minato, demonstrating practical sealing and chakra manipulation skills 41.

Taijutsu and Combat Prowess

Shu Furukawa's physical abilities match his ninjutsu talents, making him a devastating close-quarters combatant. He combines raw strength, speed, and strategic cunning to overwhelm opponents. His feats include shattering the earth with a single stomp, delivering powerful punches and kicks, and using kenjutsu with wind infusion. He often sets traps and coordinates with teammates to create openings. His chakra-enhanced body allows him to survive hits from expert veterans and deliver counterattacks that end engagements instantly.

• Defeated Inabi Uchiha in the Chunin Exams by superior speed and power, rendering the Sharingan ineffective 21.
• One-shot three Kumogakure ninjas in rapid succession, using a punch to send one flying and an uppercut to slam another into a tree trunk 20.
• Blocked a rock-covered fist from a Kusagakure jonin and delivered a close-range elbow strike, killing the clone 28.
• Used a blue blade of light (likely wind-infused) to slice an Iwagakure jonin in half during a battle 33.
• In training, created a massive crater in the ground with a downward sword strike 37.
• Ambushed and defeated Might Guy during sparring, using a trap of steel wires followed by a Fire Style: Flame Bullet 36.
• Easily subdued a Root ninja assigned to follow him, showcasing his dominance over elite operatives 47.
• His endurance and chakra reserves allow him to release high-cost techniques like Chidori multiple times in a row without exhaustion 17.

Power Progression

Stage	Age	Key Achievements
Academy	4–5	Enrolled in Ninja Academy Class 1-A; demonstrated exceptional ninjutsu talent and chakra control; used [Collection] to gain ninjutsu insights; improved Military Ration Pills; won training match against Kakashi 1 2 7 8.
Genin	5–6	Graduated early via alternative exam with Tsunade; mastered Chidori; began medical ninjutsu training; treated patients including a Sarutobi jonin; researched Kekkei Genkai and jinchuriki 9 30.
Chunin Exams	7–8	Nominated for joint Chunin Exams; defeated opponents using taijutsu and shurikenjutsu; advanced to finals; promoted to Chunin; assigned squad leader 18 21 22.
Major Power-ups	7–8+	Signed contract with Katsuyu and entered Shikkotsu Forest; learned about Sage Technique but initially failed to master; later refined Sage Chakra via Strength of a Hundred Seal; received forbidden Spirit Transformation Technique from Orochimaru; mastered Fire Style: Great Fireball; developed Chidori Sharp Spear 23 25 30 36 47.

Relationships

Tsunade

Shu Furukawa’s most formative relationship is with his sensei, Tsunade. Initially, Tsunade recognized his talent during a card game and offered to take him as her student, eventually guiding him in medical ninjutsu and the Sage Technique of Shikkotsu Forest 8 9. Though she found amusement in his early struggles with Sage energy, she consistently pushed him to grow, sharing her private collection of jutsu and her pharmacopoeia 13 25. Their bond deepened through shared meals, drunken confessions, and protective arguments — Tsunade fiercely opposed any attempt to exploit Shu for war or political gain, while Shu remained loyal, refusing Orochimaru’s overtures to abandon her side 16 36 50. At the same time, Tsunade’s own insecurities surfaced: she worried about his future, drank heavily to cope with pressure, and often dismissed the Hokage position, yet Shu’s steady presence helped ground her 26 30.

Kakashi Hatake

Shu and Kakashi share a rivalry that evolved into mutual respect and friendship. From their first spar at the Ninja Academy, Shu’s superior speed and reflexes forced Kakashi to acknowledge his own limitations 4. Over time, Shu became a mentor figure, teaching Kakashi the Chidori technique and warning him of its dangers, while Kakashi’s own drive to improve pushed Shu to refine his swordsmanship 17. After the death of Hatake Sakumo, Kakashi became reclusive and training-obsessed, but Shu helped guide him toward finding his own path, and the two later served together as Chunin on joint missions 16 22. Their partnership, built on honest competition and shared growth, is one of the few relationships that tempers Shu’s otherwise solitary ambitions.

Might Guy

Might Guy’s boundless enthusiasm meets Shu’s calm competence, creating a bond of friendly rivalry and teamwork. Guy first admired Shu during academy training sessions where Shu effortlessly deflected shuriken and later defeated Kakashi in spars 4 8. The two trained together intensively, focusing on combination attacks and strategy, and Guy’s speed eventually caught up to Kakashi’s 25. Shu also showed concern for Guy’s teammates and supported his decisions, such as when Guy chose to skip the Chunin Exams to protect his squad 36. Despite their contrasting personalities, Guy’s unwavering “youthful” drive and Shu’s pragmatic support make them reliable comrades in battle and in the village.

Orochimaru

Orochimaru views Shu with a mix of fascination and predatory interest. He frequently praises Shu’s battlefield performance and openly criticizes Tsunade’s teaching as too gentle, offering to take Shu as his own student 50. Their relationship is defined by a shared obsession with forbidden knowledge: Orochimaru gifts Shu the Spirit Transformation Technique and invites him to collaborate on experiments about the soul and immortality, which Shu cautiously accepts 36. Yet Shu remains wary, never fully trusting Orochimaru’s motives, and often deflects his more extreme propositions. Orochimaru’s presence serves as a dark mirror, tempting Shu toward the same path of power that Orochimaru himself walks.

Obito Uchiha

Obito’s feelings toward Shu are a tangle of jealousy, admiration, and insecurity. Watching Shu easily defeat opponents in the Chunin Exams while struggling with his own skills, Obito feels inferior and worries he cannot compete 23. His resentment is compounded by Rin’s open appreciation of Shu — when Rin praises Shu’s helpfulness in the Medical Corps, Obito becomes sullen 23. Shu, for his part, treats Obito kindly, once reassuring Rin that Obito would improve, but he privately notes that Obito’s crush on Rin is unlikely to be reciprocated 25 29. Their dynamic highlights Obito’s struggle for identity and Shu’s role as an unattainable benchmark.

Rin Nohara

Rin holds Shu in high regard as a capable and kind teammate. She appreciates his patience in answering medical questions and sees him as a reassuring presence in the chaotic environment of the Medical Corps 23. When she worries about Kakashi, Shu offers subdued reassurances that Kakashi will recover 16. They share a friendly rapport; Rin is happy to see Shu at group photos and even fantasizes about being on a team with Kakashi, but she never directs the same romantic longing toward Shu 10 29. Shu, in turn, respects her dedication to medicine and treats her with consistent courtesy.

Shizune

Shizune is Shu’s first close friend at the Ninja Academy, bonding over their shared interest in medical ninjutsu 3. She remains devoted to him as a classmate and later as a genin, seeking his advice on ninjutsu and enjoying casual outings with him and Tsunade 30 9. Shizune’s loyalty is unwavering — she is happy at his graduation, giggles at Tsunade’s failed cooking, and worries about the coming war alongside him 9 26. Their relationship is one of quiet companionship, with Shizune often serving as Shu’s emotional anchor in the more domestic moments of his life.

Katsuyu

The giant slug sage of Shikkotsu Forest becomes Shu’s summoning partner and unexpected confidant. After Tsunade introduced him to the Sage contract, Katsuyu began accompanying Shu, perched on his shoulder and sensing his increasingly dense Sage Chakra 23 47. She finds him “stranger” than most contractors, especially for his desire to be “cursed,” but her gentle temperament makes her a calm, perceptive presence 26. They discuss matters of the village, such as Tsunade’s potential as Hokage, and Katsuyu’s enthusiasm for Shu’s growth (even for “mental pollution”) shows a rare bond between summoner and summon across the Sage realms 43 47.

Baki

Baki, a Sunagakure genin, emerges as Shu’s declared lifelong rival during the Joint Chunin Exams. After a swift defeat, Baki forfeits the match rather than face further injury, vowing to grow strong enough to challenge Shu again 20 21. This sets up a future conflict driven by personal ambition, as Baki sees Shu as the target he must surpass. Shu’s reaction is understated — he acknowledges Baki’s determination but focuses on the next opponent — yet the rivalry remains a thread for potential later clashes.

Key Events

1. Shu Furukawa's parents are killed during a mission in early January, triggering his [Collection] ability and leaving him an orphan. 2
2. Shu enters the Ninja Academy and is praised by Hatake Sakumo for his ninjutsu talent, surpassing even Kakashi. 1
3. Shu Furukawa graduates early from the Ninja Academy, demonstrating the Chidori technique to Tsunade, and becomes a genin. 9
4. Hatake Sakumo commits suicide in March, causing deep emotional trauma for Kakashi and prompting changes in his behavior. 16
5. The Joint Chunin Exams are proposed by Danzo and the higher-ups; Shu is nominated to participate alone against Tsunade's wishes. 16 18
6. Shu Furukawa participates in the first stage of the Joint Chunin Exams: he waits at the Central Tower in the Forest of Death, defeats multiple teams—including a reckless team, a team from Kumogakure, and finally Baki's Sunagakure team—sparing Baki's life. 20
7. In the second stage of the Chunin Exams, Baki forfeits his duel against Shu due to injuries and vows to become Shu's lifelong rival. 21
8. Shu Furukawa defeats Inabi Uchiha in a one-on-one duel, overcoming the Sharingan with superior taijutsu speed and power. 21
9. Sarutobi Hiruzen promotes Shu Furukawa and Kakashi to Chunin, assigning them squad leader roles and mentoring them on leadership. 22
10. Shu Furukawa is summoned by Tsunade on his birthday, signs the contract for the Sage Technique of Shikkotsu Forest, and meets the slug sage Katsuyu in Shikkotsu Forest. 23
11. Shu Furukawa returns from Shikkotsu Forest and begins training in the Sage Technique under Tsunade, but fails to master it initially. 25
12. Shu Furukawa, Kakashi, and Might Guy engage in joint training, improving teamwork; Shu shares information about a future joint mission with Iwagakure. 25
13. Orochimaru visits Shu Furukawa, offering him the forbidden Spirit Transformation Technique and requesting his help in future experiments. 36
14. Shu Furukawa joins an Anbu mission and witnesses a Tailed Beast Bomb, gaining new insights into tailed beasts and sealing techniques. 39
15. Shu Furukawa causes significant damage to Killer B of Kumogakure, leading to discussions about promoting him to Special Jonin. 45
16. Shu Furukawa tours the Uchiha clan compound with Fugaku Uchiha, discussing clan reforms and the balance of light and darkness in the village. 46
17. Shu Furukawa defeats a Root ninja sent to monitor him, demonstrating his growth and dismissing the agent with a warning. 47
18. The Third Kazekage is reported killed by his own people, sparking internal strife in Sunagakure. 50
19. During the war, Konoha forces under Orochimaru push Sunagakure back to their home territory; Shu Furukawa unleashes a large-scale Water Style: Water Colliding Wave that clears more than half the battlefield, and he shows compassion toward the dead. 50