Koseigan

The **Kōseigan** (*Kanji*: **黄星眼**; *English*: **Yellow Star Eye**) is a Dōjutsu-type Kekkei Genkai. It originates from a member of the Ōtsutsuki Clan, but in the present, it's limited and unique to 1 to 3 members of the Hagoromo Clan every generation.

## ***Inheritance***

Even among the members of the Hagoromo Clan and the Ōtsutsuki, the Kōseigan is mysterious and rare. It appeared in 1 and only 1 of member of the Ōtsutsuki Clan, and under normal circumstances, naught but 1 Hagaoromo will inherit it per generation. In addition, there has been multiple times where it has disappeared among the Hagoromo for multiple generations and then reappeared at random...

...regardless, the Kōseigan can not be acquired through any means other than inheritance. As the Kōseigan can not awakened from dormancy like the Sharingan, and the Kōseigan can not be attained through metamorphosis like the Rinnegan. In addition, in stark contrast to a supermajority of dōjutsu, the Kōseigan can not be used by anyone but its inheritor. As a Kōseigan can not be maintained or stimulated by anyone but its inheritor. As such, if a Kōseigan is removed from its inheritor and transplanted into another individual, the Kōseigan will not preserve in the individual's body and the Kōseigan will not respond to the individual's body. Even worse, the Kōseigan will also drain the individual of chakra and rot into a toxin as well!

Only an inheritor, an individual born with the Kōseigan, can bear a Kōseigan without consequence and wield a Kōseigan with effectiveness.

## ***Abilities***

### *Perception of Energy*

First and foremost, the Kōseigan exhibits the ability to perceive all forms of energy.

In addition, in conjunction with its ability to perceive energy, the Kōseigan is able to differentiate all forms of energy from all other forms of energy. Notably, the Kōseigan's differentiation between forms of energy is both macroscopic and microscopic. As the Kōseigan can differentiate between an individual's chakra from another individual's chakra just as well as it can differentiate between the physical energy that chakra is composed of and the spiritual energy that chakra is composed of. As such, the Kōseigan is able to perceive chakra to an extent that surpasses even the Byakugan's perception of chakra!

Frigh in conjunction with pattern recognition in order to

### *Sixth Sense*

Second, by using the brain's pattern recognition in conjunction with its perception of energy, the Kōseigan is able to detect and interpret an entity's actions and thereby predict the entity's actions. Subsequently, the Kōseigan can warn its inheritor about the entity's actions before the entity manages to complete those actions.

For instance, the Kōseigan can detect the kinetic energy within a projectile's body and then interpret the kinetic energy in order to predict the projectile's trajectory and then warn its inheritor about the projectile's trajectory. Another example is that the Kōseigan can detect and interpret chemical energy in order to predict and warn its inheritor about a chemical reaction, and yet another example is that the Kōseigan can detect and interpret the electrical energy of an individual's nervous system in order to predict and warn its inheritor about the individual's feelings and thoughts!

Notably, while an inheritor may be conscious of the predictions and warnings that are given by the Kōseigan, an inheritor is not conscious of the Kōseigan's detection and interpretation of energy. As such, when an inheritor receives a prediction and warning, the inheritor does not receive an understanding of what the Kōseigan has warned and predicted about. The inheritor may be warned about an explosion or poison, but the inheritor will not learn how the explosion or poison was broughy about despite the fact that the Kōseigan understands how the explosion or poison was brought. As such, unlike the Sharingan, the Kōseigan can not be used as a means of emulation.

### *Time Dilation*

Third, without its inheritor's input or knowledge, the Kōseigan is able to cast a Space-Time Ninjutsu which dilates the time between an action and its inheritor's reaction to the action.

Whenever the Kōseigan predicts both an action and the fact that a warning will not be enough to allow its inheritor to react to and survive the action, the Kōseigan will cast the aforementioned Space-Time Ninjutsu in order to give its inheritor the ability to react to and survive the action! However, the Kōseigan is unable to cast this Space-Time Ninjutsu without cost. As such, if the Kōseigan's inheritor does not exhibit the chakra to cast this Space-Time Ninjutsu, the Kōseigan will not be able to cast this Space-Time Ninjutsu.

Notably, this ability allows a Kōseigan's inheritor to notice and react to genjutsu before the genjutsu manages to influence or trap the inheritor!

## ***Dojutsu***

By using a ninjutsu-based ability to augment its Observer Effect on the energy that it is perceiving, the Kōseigan is capable of casting any of 5 dōjutsu. Notably, whenever the Kōseigan casts a dōjutsu, certain points of its five-pointed star-shaped pupils will ignite with chakra.

### *Acala*

**Acala** (*Romaji*: **Fudō Myō-ō**; *Kanji*: **不動明王**) is one of the 5 dōjutsu of the Kōseigan. Whenever it's active, the bottom right pupil of the left eye will be ignited with chakra alongside the bottom left pupil of the right eye.

Acala augments the durability of an entity by converting the inheritor's chakra into chemical energy and then imbuing that chemical energy into the entity in order to strengthen the entity's chemical bonds. Through Acala, any entity within sight can become as durable as the inheritor's reservoir of chakra allows.

### *Kuṇḍali*

**Kuṇḍali** (*Romaji*: **Gundari Myō-ō**; *Kanji*: **軍荼利明王**) is one of the 5 dōjutsu of the Kōseigan. Whenever it's active, the bottom left pupil of the left eye will be ignited with chakra alongside the bottom right pupil of the right eye.

Kundali alters an entity's viscosity by adjusting the kinetic energy of the entity's molecules via expenditure of the chakra of the Kōseigan's inheritor.

### *Trailokyavijaya*

**Trailokyavijaya** (Romaji: **Gozanze Myō-ō**; *Kanji*: **降三世明王**) is one of the 5 dōjutsu of the Kōseigan. Whenever it's active, the left pupil of the left eye will be ignited with chakra alongside the right pupil of the right eye.

Trailokyavijaya upgrades ninjutsu into senjutsu by fusing the natural energy around the ninjutsu into the physical energy and spiritual energy that the ninjutsu is composed of.

### *Vajrayakṣa*

**Vajrayakṣa** (*Romaji*: **Kongōyasha Myō-ō**; *Kanji*: **金剛夜叉明王**) is one of the 5 dōjutsu of the Kōseigan. Whenever it's active, the upper pupil of the left eye will be ignited with chakra alongside the upper pupil of the right eye.

Vajrayakṣa consumes an entity by converting the entity's energy into potential energy and then digests the entity by transferring that potential energy to the Kōseigan's inheritor. Notably, similar to Amaterasu and Kamui, it's gradual rather than instantaneous and thus can be escaped and even evaded.

### *Yamāntaka*

**Yamāntaka** (*Romaji*: **Daiitoku Myō-ō**; *Kanji*: **大威德明王**) is one of the 5 dōjutsu of the Kōseigan. Whenever it's active, the right pupil of the left eye will be ignited with chakra alongside the left pupil of the right eye.

Yamāntaka captures and imprisons bodiless souls by by converting the inheritor's chakra into physical energy and then imbuing that physical energy into the bodiless soul in order to bind the physical energy to the bodiless soul's spiritual energy and thereby detain the bodiless soul. Notably, Yamāntaka can not be used on the souls of the living or the reanimated. Instead, Yamāntaka is limited to ghosts or the souls of the recently deceased if the souls have yet to pass on before Yamāntaka is targeted on them.

## ***Trivia***

* Its dōjutsu are named and themed after the Five Wisdom Kings.