Kosuke

Biodata

Feature	Value
Name	Uchiha Kosuke (苍介)
Alias(es)	Lin An; Master of Heavenly Dao; Anbu Leader; “Black and Red Twin Evils” (with Madara)
Species/Race	Uchiha
Gender	Male
Affiliation	Uchiha Clan; Heavenly Dao; Uchiha Anbu; Uchiha Merchant Guild
Occupation/Role	Founder and leader of the Anbu; founder of Heavenly Dao; researcher; military commander
Status	Alive
First Appearance	2

Power Progression

Stage / Realm / Level	Chapter	Notes
Early Sharingan signs	2	Shows signs of Sharingan activation and an understanding of chakra flow.
Three Tomoe Sharingan	27	States that his Sharingan evolved to Three Tomoe two days earlier.
Mangekyo Sharingan	42	Uses a self-evolved Mangekyo Sharingan to seize control of the Land of Fire’s Daimyo through genjutsu.
Mangekyo spatial ability	46 67 88	Stores and retrieves objects and scrolls through a black spatial opening associated with his eye; later stores the Tenkei Clan’s archive in his right eye.
Dust Release Susanoo	46 90	Develops Dust Release into a Susanoo-like form; its annihilation attacks decompose targets but impose severe chakra drain.
Space-attribute Dust Release	91	A shadow clone masters Space Attribute Nature and integrates it into Dust Release.
Initial stage of the Immortal Path	95	Establishes the Primal System and cultivates Primordial Qi, enhancing movement and ninjutsu while allowing rapid recovery of expended energy.
Fourth Realm / Yuyuan Realm; Qi Pill formed	106 108 109	Breaks through a Heart Demon illusion, withstands Lightning Tribulation with Dragon Vein energy, forms a Qi Pill, and enters the fourth realm.
Primordial Dao Eye	106	Freezes and begins dissolving the Heart Demon’s illusion after Kosuke regains his memories.
Domain Within	94	Creates a roughly two-meter domain that greatly concentrates Natural Energy and responds to his command.

Background

Kosuke was present as an infant when Senju ninja ambushed his mother, Uchiha Aoba. During the attack, he perceived the violence around him and showed early signs of Sharingan activation. Aoba protected Kosuke and Mina with Izanagi, losing sight in one eye as a consequence. 2

By age three, Kosuke was already writing and drawing. He possessed an unusual theoretical understanding of chakra, warning Madara, Izuna, and Mina that excessive refinement could damage a developing body by depriving it of the energy needed for growth. 5 6

After Aoba awakened her Mangekyo Sharingan, Kosuke devised a secret plan for her to obtain a deceased relative’s Three Tomoe Sharingan and replace her failing eye. His goal was to help her attain Eternal Mangekyo Sharingan and avoid blindness. 10

At five, Kosuke served alongside Aoba in treating Uchiha casualties during wartime, organizing a children’s medical team and personally treating many wounded clansmen. 13 14

Personality

Kosuke is highly intelligent, calculating, and intensely protective of those he considers family. From childhood, he intervenes in Aoba’s medical decisions, warns Mina against dangerous chakra practices, and worries over Izuna’s survival on the battlefield. 5 10 13 21

He is blunt and often abrasive, particularly toward Madara and Izuna, but his harshness is frequently rooted in fear that their recklessness will get them killed. He demands loyalty to the Uchiha Clan and believes power and status are prerequisites for defying clan orders. 23

As an adult, Kosuke becomes markedly calmer and more politically ambitious. He builds Heavenly Dao in secret, takes control of the Land of Fire’s Daimyo, recruits weakened clans, and treats economic influence, intelligence, military power, and research as interconnected tools. 42 56 57

His pursuit of power can become self-destructive. He repeatedly overworks himself through research and training, alarming Mina and exhausting his shadow clones. 56 82 83 91

Appearance

Kosuke is an Uchiha whose eyes develop from the Sharingan into an unusual self-evolved Mangekyo Sharingan. At age twenty, his earlier playfulness has given way to a composed, controlled bearing. 42

• His Mangekyo has a black central pupil surrounded by three rotating, flame-like black patterns. 42
• He wears black armor during battlefield operations. 27
• His Mangekyo Sharingan emits a bloody crimson light when he is enraged. 47

Abilities & Skills

Sharingan and Mangekyo Sharingan

Kosuke’s ocular abilities provide perception, genjutsu, spatial storage, and access to Susanoo.

• Uses Mangekyo genjutsu to silently control the Daimyo and his mansion personnel. 42
• Develops a crimson Susanoo that defeats Kaguya Hōseki. 44
• Stores physical items—including scrolls, meat, and the Tenkei Clan’s records—in a dojutsu space. 46 67 88
• His Mangekyo abilities can trigger immense chakra pressure, though intensive use can strain him. 23 47

Chakra Theory and Circulation Research

Kosuke studies chakra formation, physical development, and circulation routes from an unusually young age.

• Explains chakra as the balanced fusion of Cellular Energy and Mental Energy. 5
• Warns that over-refinement can consume resources needed for bodily growth and create lasting harm. 5 6
• Develops the Lesser Heavenly Circulation route, improving chakra precision and reducing loss. 21
• Identifies its limitation: improved precision may reduce the power and speed of large-scale ninjutsu. 21
• Provides an optimized Greater Heavenly Circulation map, but its first volunteer, Mizuma, dies after uncontrolled Natural Energy absorption. 22

Medical and Biological Research

Kosuke has practical medical experience and later expands into biological experimentation.

• Treats wounded Uchiha during wartime and leads a children’s medical team. 13 14
• Pursues improvements to Sharingan potions using Hashirama tissue. 62
• Maintains research facilities beneath Heavenly Dao’s infrastructure and studies Hashirama-cell replicas. 55 78
• Arranges ongoing potion deliveries for the Kaguya Clan after bringing them under his protection. 50

Sealing Techniques

Kosuke seeks Uzumaki sealing knowledge and later works in tandem with Mito.

• Creates a Symbiotic Curse Seal linking his and Mito’s chakra pathways and lifespans. 27
• Captures Mito in part to obtain Uzumaki sealing techniques. 27 30
• Uses the Four Symbols Sealing Array to contain a Dragon Vein energy leak. 87
• Reinforces the Rōran Dragon Vein seal after his cultivation breakthrough. 109

Dust Release

Kosuke develops Dust Release as a Kekkei Tōta combining Earth, Wind, and Fire Release.

• Demonstrates its decomposition capability to his family. 46
• Initially struggles to scale his Dust Release Susanoo safely beyond a small construct. 46
• Later uses Dust Release freely and records its construction principles. 57
• Integrates Space Attribute Nature into Dust Release through shadow-clone research. 91
• Uses Dust Release Susanoo to destroy the White Princess’s mountain and snake swarm. 90
• Limit: The technique consumes immense chakra and leaves him severely weakened. 90

Natural Energy and Primal Cultivation

Kosuke researches Natural Energy despite its risks, ultimately establishing his own cultivation path.

• Investigates the Tenkei Clan’s Natural Energy-related Kekkei Genkai and obtains its stored knowledge. 87 88
• Names his system the Primal System and its energy Primordial Qi. 95
• Enhances the Flowing Water Steps, Fireball, and World Separation Technique with minimal Primordial Qi expenditure. 95
• Uses his Cultivation Method to replenish Primordial Qi quickly. 95
• Survives Heart Demon Fire and Lightning Tribulation, using Dragon Vein energy to temper his meridians and forge a Qi Pill. 108 109
• Develops the Restoration Technique, which appears to restore an injury to its pre-wounded state. 94

Leadership and Strategy

Kosuke commands through planning, force, economic leverage, and intelligence control.

• Establishes Heavenly Dao, an organization with an intelligence network extending across the Land of Fire and beyond. 42
• Becomes the Uchiha Clan’s Anbu leader and is granted all military power within the clan. 56
• Proposes the Uchiha commercial department, taxes, and a “money house” for deposits, lending, fundraising, and economic influence. 56 57
• Directs Anbu operations to protect the Uchiha Merchant Guild and eliminate bandit threats. 82
• Steps back from direct political rule in U Country, leaving Madara to handle governance. 103

Equipment / Weapons / Items

• Kunai and Exploding Tags — Uses kunai in combat and intimidation. 23
• Sealing scrolls — Carries scrolls for seals, stored objects, and research materials. 27 87
• Dust Release cultivation scroll — Retrieves and shares a scroll containing the cultivation method. 46
• Symbiotic Curse Seal contract — Binding seal created for Mito. 27
• Black armor — Worn during the Uzumaki battlefield operation. 27

Relationships

• Uchiha Aoba — Mother. Kosuke works to preserve her eyesight and supports her transition toward medical work. 10 11
• Uchiha Mina — Older sister. He is protective of her and relies on her to manage Anbu and Merchant Guild finances; she worries over his health and overwork. 5 23 82 83
• Uchiha Madara — Ally, rival, and later clan head. Their relationship includes arguments, battlefield cooperation, research discussions, and shared political projects. 23 42 56 65 67
• Uchiha Izuna — Family member and frequent target of Kosuke’s stern warnings. Kosuke repeatedly worries that Izuna’s recklessness will lead to his death. 21 23 51
• Uzumaki Mito — Initially Kosuke’s captive and sealing instructor; later his wife and a close research partner. 27 30 87 91 103
• Uchiha Tajima — Uchiha clan head who rescues Kosuke’s family in childhood and later appoints Kosuke to establish the Anbu. 2 56
• Hyuga Yuji — Research subordinate. Kosuke promises to remove Yuji’s Caged Bird curse mark in exchange for completed projects. 50 85 91
• Kaguya Hōseki — Defeated adversary whose submission brings the Kaguya Clan under Kosuke’s influence. 43 44
• White Princess — Ryūchi Cave adversary whom Kosuke defeats and threatens after she endangers local villagers. 90
• White Snake Sage — Confrontational figure at Ryūchi Cave who covets the “origin” energy within Kosuke. 112

Story Role / Major Arcs

Childhood and Chakra Research

Kosuke emerges as a prodigy who understands chakra refinement far beyond his age. He teaches Madara, Izuna, and Mina, develops alternative circulation concepts, and begins shaping family decisions around long-term survival. 5 6 8 10

Uchiha War Medic and Battlefield Combatant

During the clan war, Kosuke serves in medical operations before rising into a feared fighter alongside Madara. The pair eventually become known as the “Black and Red Twin Evils.” 13 14 22

Uzumaki Operation

Kosuke captures Uzumaki Mito, forces her into a Symbiotic Curse Seal, and uses her disappearance to pressure the Uzumaki Clan into withdrawing from the war. He later retains her to learn sealing techniques. 27 30

Heavenly Dao and Land of Fire Takeover

Over ten years, Kosuke builds Heavenly Dao into a wide-reaching power network. He uses Mangekyo genjutsu to control the Daimyo’s Mansion, making himself the Land of Fire’s hidden ruler. 42

Clan Expansion and Kekkei Genkai Research

Kosuke recruits or subdues the Hagoromo, Kaguya, and Hyuga-connected forces while developing Dust Release Susanoo and pursuing Natural Energy research. 43 44 46 50

Anbu and Commercial Reforms

Following Tajima’s retirement, Kosuke establishes the Uchiha Anbu and receives military authority. He then creates plans for commerce, taxation, the Merchant Guild, and the money house. 56 57 82

Primal System and Tribulation

Kosuke researches Natural Energy through the Tenkei Clan’s knowledge, creates the Primal System, and endures a sequence of Heart Demon and Lightning Tribulations to enter the Yuyuan Realm. 87 88 95 106 108 109

Ryūchi Cave Confrontation

After reaching the fourth realm, Kosuke enters Ryūchi Cave and openly provokes the White Snake Sage, who recognizes and covets the origin energy within him. 109 112

Trivia

• Kosuke was already drawing and writing at three months old. 5
• He negotiated a furniture partnership with Uchiha Tree in which he would receive 70% of the profits. 20
• He uses shadow clones extensively for research, but their accumulated strain causes frequent collapse and feedback. 82 91
• His decision to spare two Uzumaki guards was prompted by witnessing two rabbits mating. 28