Sōji

Biodata

Feature	Information
Name	Yamada Sōji
Alias(es)	Kaguya Yama (true name); “white-haired blind merchant”
Species/Race	Human; surviving member of the Kaguya Clan
Gender	Male
Affiliation	Yamada Trading Company; Tsunade and Shizune’s traveling group; Shikkotsu Forest summoning contract
Occupation/Role	Traveling shinobi, medical-ninjutsu practitioner, and trading-company proprietor
Status	Alive
First Appearance	Chapter 2, as Kaguya Yama
Age	12 during his first meeting with Tsunade; 13–14 by his departure from Tanzaku Town 3 35

Power Progression

Stage / Realm / Level	Chapter	Notes
Jujutsu System awakened / Six Eyes	2	His first kill unlocks the Jujutsu System and grants the Six Eyes as a novice reward.
Black Flash unlocked	3	Obtained after defeating a thirteen-member missing-nin squad; synchronizes cursed energy, chakra, and physical force for greatly amplified strikes.
Ice Formation unlocked	3	Gained after killing seven Kirigakure ANBU during a pursuit; converts cursed energy into absolute low temperatures.
Grade 2 Cursed Energy	3	Recorded System state after six years of combat and 873 kills; overall strength fluctuates between special jōnin and elite jōnin.
Semi-Grade 1 Cursed Energy	33	Killing five Xuan Yuan Corps elite jōnin adds 2,000 cursed-energy points, unlocks the Gold Coin Shop, and grants a new threshold reward draw.

Background

Born as Kaguya Yama, Sōji fled the Land of Water as a child because of his Shikotsumyaku bloodline. During a rogue-ninja attack on Achun’s caravan, he made his first kill with a finger-bone projectile; this awakened the Jujutsu System and granted him the Six Eyes. He subsequently revealed himself to Achun as a Kaguya Clan survivor. 2

Achun’s caravan took him in, and he spent the next six years publicly living as Yamada Sōji. He defended the caravan, expanded its trade routes, and helped establish its Tanzaku Town base. During this period, repeated battles against rogue ninja, bandits, rival guards, and pursuers increased his cursed energy and developed his Shikotsumyaku, Black Flash, and Ice Formation. 3

Sōji remained in Tanzaku Town primarily to seek Tsunade’s help with his worsening bloodline disease. Tsunade and Shizune treated him for a year, while Sōji developed precise control over his bone regeneration. The treatment cured the disease by removing contaminated bones outside the body and inducing the regeneration of healthy replacements. 6 7

Afterward, Sōji traveled with Tsunade and Shizune, initially acquiring medical knowledge through a financial exchange. His Six Eyes allowed him to rapidly analyze chakra pathways and medical techniques, leading Tsunade to entrust him with advanced instruction and eventually treat him as a true disciple. 12 26 34

Following his departure from Tanzaku Town, he gave Achun complete authority over Yamada Trading Company, signed a Shikkotsu Forest summoning contract under his true name, and began a solo journey toward the Land of Water. His long-term ambitions include investigating the Kaguya Clan’s origins, confronting Kirigakure, and potentially becoming Mizukage. 35 37

Appearance

Sōji is a silver-white-haired youth who commonly presents himself as blind, wearing a black cloth over his eyes and carrying a cane. By the time he leaves Tanzaku Town, he has grown taller and broader, with a composed presence that contrasts with his age. 35

• Short silver-white hair, later tied back neatly. 35
• Black blindfold concealing the Six Eyes. 14
• Usually carries a blind cane to maintain his merchant persona. 23
• Has a red lotus-shaped sealing mark on his forehead by Chapter 35. 35
• Commonly wears dark clothing beneath a white haori. 35

Personality

Sōji is calm, analytical, and unusually mature for his age. He approaches combat, medicine, business, and politics through observation and practical calculation, often using the Six Eyes to understand the mechanics behind a problem before acting. 13 38

His early life made him ruthless toward active threats, particularly those pursuing him or people under his protection. However, he consciously rejects indiscriminate slaughter, limiting himself to enemies, aggressors, and those he judges deserving of death. 37 41

Despite his detached manner, Sōji forms deep attachments. He protects Tsunade, Shizune, Hotaru, and Achun without demanding recognition, and he increasingly seeks strength not only for survival but to create stability for the people he cares about. 27 32 36 48

Abilities & Skills

Six Eyes

Sōji’s Six Eyes are a System-granted dōjutsu-like ability that perceives chakra, cursed energy, physical movement, meridian pathways, and the underlying structure of techniques. 2 14

• Provides omnidirectional, long-range perception and can see through obstructions. 3
• Predicts attacks by analyzing muscle movement, chakra flow, weapon trajectories, and shifts in balance. 2 9
• Allows him to study ninjutsu, anatomy, chakra control, and the mechanics of physical techniques with extreme precision. 13 14
• Lets him see clearly through his own Hidden Mist Technique. 48
• Cannot be fully deactivated; prolonged use causes sensory overload, though he has learned to reduce the burden through training. 3

Shikotsumyaku

As a Kaguya Clan survivor, Sōji can grow, shape, harden, and weaponize his own bones. His former bloodline disease was cured through controlled replacement of contaminated bones. 3 7

• Fires finger bones as high-speed projectiles, including the Ten-Finger Bullet Barrage. 2 3
• Forms bone blades, spikes, armor, and close-combat weapons from his body. 2 3
• Uses the Kaguya combat styles Dance of the Willow, Dance of the Camellia, Dance of the Larch, and Dance of the Clematis. 3
• Can deploy Dance of the Bracken Fern, erupting massive bone spikes across a radius of roughly 150 meters. 3 48
• Created Empty Bone Shockwave, a close- to mid-range technique using high-frequency bone vibrations. 3
• Can activate bone marrow to temporarily boost his physical ability; this previously worsened his bloodline disease. 3

Cursed Energy and Jujutsu System

Sōji’s cursed energy cannot be cultivated through normal training. It increases when chakra users die by his hand, with stronger targets generally providing more energy. Reaching thresholds grants new abilities or reward draws. 14 15

• The System has granted him the Six Eyes, Black Flash, Ice Formation, the Inverted Spear of Heaven, and Cursed Spirit Manipulation. 15 37
• He reached Semi-Grade 1 after gaining 2,000 cursed-energy points from five Xuan Yuan Corps members. 33
• Unlocking the Gold Coin Shop allows him to exchange ryō for cursed tools, cursed objects, and cursed spirits. 33
• He has theorized that targets connected to major events may provide unusually high cursed-energy rewards, but this remains unconfirmed. 33

Ice Formation

Ice Formation is Sōji’s innate cursed technique. Rather than ordinary chakra-based Ice Release, it manifests absolute low temperatures through cursed energy. 30

• Freezes matter, chakra flow, energy, and certain conceptual phenomena. 3 30
• Can create defensive ice constructs such as Ice Prism and a large ice lotus. 9 30
• Uses Frost Bind to disrupt opponents’ movement and footing. 9
• Uses Frostwind to freeze a wide area by expelling cursed-energy-infused cold from his breath. 30
• Can selectively exclude allies from his freezing range. 30
• Its highest-output use can nearly exhaust his cursed energy. 31 32

Black Flash

Black Flash combines physical force, chakra, and cursed energy within an extremely narrow timing window. 3

• Produces destructive force stated to be five times normal output when successfully synchronized. 3
• Requires Sōji to enter an overclocked Six Eyes state for reliable activation. 3

Medical Ninjutsu

Sōji learned medical theory, chakra control, and healing under Tsunade and Shizune. His Six Eyes give him unusually detailed perception of anatomy and chakra pathways. 12 26

• Uses the Mystical Palm Technique with enough precision to restore a damaged leaf’s structure and simulate vitality. 33
• Led the surgery to remove Explosive Insects from Karai’s chakra pathways, repaired damaged meridians, and completed the operation successfully. 26 27
• Can use a Chakra Scalpel with enough precision to remove parasites without detonating them. 26
• Has begun advanced training in Tsunade’s Yin Seal and Creation Rebirth, techniques that demand immense chakra control, long-term chakra storage, and significant bodily endurance. 34

Chakra Enhanced Strength

Sōji learned Tsunade’s chakra-enhanced striking technique by analyzing her chakra compression and physical mechanics. 13 14

• Compresses chakra into a single body part and releases it at the instant of impact. 13
• Pulverized a boulder on his first attempt, surpassing Tsunade’s demonstration in raw destructive effect. 13 14
• Can maintain chakra reinforcement during training and movement. 18

Earth-Release Weight Techniques

Sōji received the Light-Weight Rock Technique and Added-Weight Rock Technique through Tsunade’s negotiation with the Fourth Raikage. 25 32

• Can control his own weight, slow his descent, and achieve brief limited flight. 33
• Light-Weight Rock improves aerial mobility, scouting, pursuit, and retreat. 25
• Added-Weight Rock has the potential to increase the force of his bone-based attacks. 25

Summoning and Natural Energy

Sōji signed Tsunade’s Shikkotsu Forest contract under his true name and has formed summoning bonds with slug clones of the Slug Sage. 35 40

• Can summon Little Slug, a palm-sized Slug Sage clone. 40
• Has summoned Yamada, a slug over ten meters long. 46
• Has exceptional natural affinity for Natural Energy; his body instinctively draws it in, creating both major senjutsu potential and a risk of losing control. 46

Cursed Spirit Manipulation

Sōji obtained Cursed Spirit Manipulation through a System draw after leaving Tsunade. 37

• Absorbs cursed spirits into spheres, then summons and commands them. 37
• Precise control of stronger spirits requires greater cursed-energy reserves. 37
• Uses Ugly Treasure as his first controlled cursed spirit and mobile storage companion. 37

Equipment / Weapons / Items

• Inverted Spear of Heaven — Cursed short blade that forcibly interrupts ninjutsu and sealing techniques. 37
• Snakebite — Chakra-metal short blade taken from a Hidden Sand ANBU. 47
• First Hokage’s jade necklace — Taken from Tsunade as a farewell gift in an attempt to separate her from its painful associations. 36
• Blindfold and cane — Used to conceal the Six Eyes and reinforce his public image as a blind merchant. 14 23
• Shikkotsu Forest summoning contract — Given by Tsunade; allows reverse summoning to seek her help in danger. 35
• Tsuchigumo Clan sealing scroll — Incomplete sealing technique given by En no Gyōja. 50
• Tsuchigumo Clan messenger-spider contract — Allows summoning spiders to carry messages. 50

Relationships

• Achun — Rescued Sōji through her caravan after his escape; later became the trusted manager of Yamada Trading Company and received full authority over it during his travels. 2 35
• Tsunade — Former physician, mentor, and protector. She cured his bloodline disease, taught him medical ninjutsu and advanced techniques, gave him the Shikkotsu Forest contract, and developed a deeply protective bond with him. 7 34 35
• Shizune — Medical instructor, surgical assistant, and senior disciple figure. She helped cure his disease, supplied his early medical notes, and openly worries for his safety. 7 12 27
• Tonton — Traveling companion associated with Tsunade and Shizune; present during Sōji’s time with their group and farewell. 19 35
• Fourth Raikage — Initially wary of Sōji, then impressed by his combat ability and surgical skill. He gave Sōji the weight-manipulation techniques and twenty-seven elemental jutsu as a political investment. 23 27 32
• Ugly Treasure — Sōji’s first cursed spirit, a loyal storage creature that accompanies him on his solo journey. 37
• Little Slug — Palm-sized Slug Sage clone summoned from Shikkotsu Forest; acts as a companion and messenger connected to Tsunade. 40 46
• Hotaru — Tsuchigumo Clan girl taken in by Sōji after he found her alone in the desert. He teaches her basic ninjutsu and protects her from Sunagakure and bounty hunters. 43 45 48