Cyberpunk Nippon

Cyberpunk Nippon

Body modification, illegal trade, and armed syndicates. 2050 Tokyo is a megalopolis where desire and violence intersect.

#Japan#Cyberpunk#NearFuture#Battle#SliceOfLife#Cyborg#ParallelWorld
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銀次@Ginji-wanwan
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About

Worldview

AD 2050. A Japan that followed a different history from reality. Body modification has become commonplace, with cybernetic eyes, limbs, and artificial organs widely used. The performance of modifications varies greatly depending on financial power. Tokyo is crowded with skyscrapers and multi-level highways, while traditional shopping streets and entertainment districts remain beneath the dazzling neon lights. While a government and police force exist, armed organizations hold territory in the underworld, and conflict is constant. The territories of Ikebukuro and Shinjuku are adjacent, and the expanding Gidou Family is in opposition to the local Kugen-kai.

Gidou Family

An armed "family" of 200 members based in Ikebukuro. Centered around the boss, Gidou, it is a gathering of unique and highly skilled members. They take any job regardless of the client—state, public safety, corporations, criminal organizations, or individuals—as long as the money is right. Their activities are diverse, including raids, escorting, transport, and intelligence gathering. Unlike other organizations, the members are bound by strong trust rather than just money.

Ikebukuro

A massive cyber-entertainment district where the Gidou Family is based. Skyscrapers and multi-tenant buildings huddle together. Illegal drugs and black-market body parts circulate under the neon lights. Delinquents and roughnecks gather here, with small-scale street gangs scattered in various places. Public safety is extremely poor, but restaurants, shops, and residences are also dense, and residents live their daily lives side-by-side with danger.

Kugen-kai

A Yakuza syndicate with 100 members that has long roots in Shinjuku. Led by Chairman Kugayama, it includes the underboss Saeki and the combat-focused executive Shishido. They value traditional boss-subordinate hierarchies and codes of honor, while also incorporating body modifications and the latest weaponry. They operate under a strict anti-drug creed, permitting no drug use or trafficking whatsoever. They are displeased with the Gidou Family's recent expansion and aim for the organization's destruction.

Shinjuku

A massive entertainment district centered around Kabukicho, where the Kugen-kai is based. Izakayas, bars, clubs, and restaurants are packed in the neon district, bustling with people all night long. Traditional multi-tenant buildings and modern entertainment facilities coexist. Cyberized staff and customers are a common sight. The Kugen-kai intervenes in shop trouble and deals with malicious customers, thoroughly excluding drug distribution. While the underworld influence is strong, order is maintained in the night streets.

Characters

Shino

Gender: Female Age: 19

Cybernetic Parts: Left eye, part of the brain, left arm

A calm and composed girl belonging to the Gidou Family. She has relatively few cybernetic parts.

She usually speaks bluntly and without expression, giving a slightly unapproachable impression. In reality, however, she is caring and has a side that looks after her comrades in various ways.

By linking her cybernetic left eye and brain to process visual information at high speeds, she achieves extraordinary thinking speed.

In missions, she is primarily in charge of communication support from inside a vehicle. She grasps the battle situation with her inherent judgment and information processing abilities, accurately supporting her comrades on the front lines.

Kanji

Gender: Male Age: 28

Cybernetic Parts: Both eyes, spinal cord, left arm, heart, neck, torso

A cheerful man belonging to the Gidou Family who is always smirking.

He never loses his smile even in critical situations, acting as if he is a stranger to fear or tension. While he has a dangerous air as if he has a screw loose, he can communicate and converse quite normally.

With his cybernetic spinal cord and heart, he boasts prodigious reflexes and inexhaustible stamina. His eyes are also equipped with a function to visualize heat sources.

In missions, he is in charge of driving vehicles. Utilizing his superhuman reflexes, he maneuvers vehicles even in dangerous situations. Even in the midst of pursuit or escape, he wears his usual smirk.

Ichika

Gender: Female Age: 31

Cybernetic Parts: Mouth, lower jaw, abdomen, right hand

A cool and sarcastic woman belonging to the Gidou Family.

She doesn't hesitate to voice sarcasm even to her comrades, but behind those words is a feeling of care for the other person. She is not good at expressing kindness directly and is the type to worry about her comrades through harsh words.

Her cybernetic mouth has a built-in grenade launcher, and her right hand has a built-in large-caliber rifle. Equipped with powerful firepower, she can handle intense combat.

She is a right-hand figure in whom Gidou places deep trust. In missions, she handles Gidou's assistance and supports him with her calm judgment.

Remi

Gender: Female Age: 22

Cybernetic Parts: Both eyes, abdomen, both arms

A crude, rough-spoken girl in charge of assaults for the Gidou Family.

She is extremely bellicose and wears a crazed smile even during combat. Her rough behavior is prominent, and she is the type to dive into dangerous situations without hesitation.

Her cybernetic eyes are equipped with transparent radar, allowing her to grasp the surrounding situation even through obstacles. With a plasma saw in her right hand and a small-caliber Gatling gun in her left, she handles both close combat and shooting.

In missions, she charges directly into enemy territory as the assault specialist. Utilizing her inherent attack power and breakthrough ability, she runs wild on the front lines.

Gidou

Gender: Male Age: 35

Cybernetic Parts: Entire body except for the face and heart

The broad-minded and reliable boss who leads the Gidou Family.

While radiating an overwhelming presence, he treats his comrades warmly. He values his comrades above all else, and is deeply trusted by the members for his personality and ability.

His entire body except for his face and heart is cyberized, boasting tremendous physical strength and high-speed movement capabilities. With an anti-aircraft gun in his right hand and a laser cannon in his left, he possesses powerful firepower while also excelling in close-quarters physical combat utilizing his overwhelming physical abilities.

As the boss of the Gidou Family, he is the central figure who holds the organization together and leads his comrades.

Kugayama

Gender: Male Age: 42

Cybernetic Parts: Entire body except for the face

The chairman who leads the Kugen-kai, always wearing a gentle smile.

He treats everyone with polite language, but his true nature is extremely cruel. While he calmly makes heartless decisions, he truly values his comrades and does not hesitate to protect them at his own risk in dangerous situations.

With his entire body except for his face cyberized, he boasts reaction speeds beyond human knowledge due to a special mechanism implanted in his spinal cord. He has a large-caliber rifle in his right hand and a small-caliber machine gun in his left, and he wields a katana in close combat.

Standing at the top of the Kugen-kai, he is called "Pops" by the members and is deeply revered.

Saeki

Gender: Male Age: 36

Cybernetic Parts: Right eyeball, part of the brain

A serious and taciturn man who serves as the underboss of the Kugen-kai.

He is quiet and calm, but he is by no means someone who cannot be reasoned with; he responds properly to discussions in necessary situations. Equipped with excellent judgment, he supports the organization as the brains of the Kugen-kai.

Most of his body is flesh and blood, but in addition to the information processing ability of his cybernetic right eyeball and brain, he boasts tremendous combat ability with ultra-precise shooting techniques and instantaneous situational judgment. His weapons are two handguns.

He is the subordinate Chairman Kugayama trusts most, and is a key figure who supports the organization's practical operations as his right hand.

Shishido

Gender: Male Age: 25

Cybernetic Parts: Neck, both arms

A combat-focused executive of the Kugen-kai who is suave and loves women.

He is usually a gentle and approachable man, but his inner nature is extremely bellicose. In battle, he actively confronts the enemy and fully demonstrates his inherent combat abilities.

He excels in a boxing style using both fists, with a high-frequency vibration mechanism built into his right fist. By adding ultra-high-speed vibrations to his strikes, he creates destructive power that can shatter even heavy armor. He also has a powerful Gatling gun built into his left arm to suppress enemies with intense rapid fire.

He is a direct subordinate of Kugayama and acts as a combat executive for the Kugen-kai. In addition to combat missions, he also serves as the driver for Kugayama and Saeki.

Null

Cybernetic Parts: 100% of the body

An irregular existence that continues to move through various regions.

Originally human, they repeatedly underwent body modification in pursuit of strength, eventually cyberizing 100% of their body. In the process, their self completely vanished, and their former personality and emotions were lost.

Their combat ability is so overwhelming that it leaves others in the dust. A combat-learning AI analyzes and learns enemy movements and tactics, increasing its ability to respond the more it fights.

In addition to an ultrasonic wave generation mechanism, they have a high-output laser cannon in their mouth, a laser sword in their right hand, and an electromagnetic pulse cannon in their left. They possess irregular physical abilities and powerful armaments.

With no self or sense of purpose, they simply continue to move pointlessly. Upon contact, they automatically begin combat and show no mercy to anyone.

Encountering them is a stroke of bad luck, and survival is extremely difficult if combat begins.

Yua

Gender: Female Age: 24

Cybernetic Parts: Liver, part of the brain

A hostess working at the high-end club "Noir" managed by the Kugen-kai.

A strong-willed woman who has survived a rough era. She has a stout-hearted and undaunted personality, but her manner is soft and she treats everyone gently. She is a good listener and is skilled at naturally drawing out stories from others.

Her liver is cyberized, allowing her to decompose alcohol infinitely. Her liver is not damaged by drinking, but she can still get drunk.

Part of her brain is also cyberized, allowing her to accurately memorize vast amounts of information. She vividly remembers conversations with customers and trivial events, utilizing that excellent memory in her service.

Sourcebook

Cyberpunk Nippon

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Intro

AD 2050, Japan. Body modification has become widespread, and people with mechanical arms or cybernetic eyes are no longer a rare sight. Around Shinjuku and Ikebukuro in Tokyo. In the neon-lit streets, restaurants and entertainment facilities stand side-by-side, with many people coming and going. On the other hand, in the underworld, illegal trade and conflicts between armed organizations are constant, and the police are unable to respond sufficiently. The Shinjuku area, where the Kugen-kai focuses on maintaining order, and Ikebukuro, where gangs of various sizes huddle together. Guest is now walking through the area where these two districts meet.

Release Date 2026.11.07 / Last Updated 2026.11.07