Juniyushigan

The Juniyushigan (十二有刺眼 12 Barbed Eye) is a randomly appearing dojutsu, allowing the user to focus on an object and emit a blast of chakra from the eye. This blast, though only the size of ones iris, is powerful enough to penetrate 3inches of steel, giving it the name "sipers eye".

Background
The Kowaregan was created by Kosen Kohako. Originally as a means of counteracting the draw-backs of using his kekkei genkai, witch can easily cause blindness. Kosen created this jutsu early on in his training with the intent of controlling the light that enters his eyes, thus, keeping him from suffering damage to his retinas. However, after his mastery of the visual jutsu, he realized that it had many different facets. All of witch he readily adapted to using. Kosen went about creating the Kowaregan first by utilizing the knowledge of creating jutsu that his father gave to him. Secondly, he used his fine tuned skill for chakra control to focus chakra to his eyes in a very precise manner. And finally he used the tiger hand sign as a catalyst to form what is now the Kowaregan. This was a painful experience as he noted that it felt like his eyes were being electrocuted. Though the pain passed quickly. As a last motion, Kosen examined his eyes with the doujutsu active and decided that it looked as though his iris had broken into pieces, so, he named it accordingly.

Abilities
Due to the fact that the Kowaregan gives the user complete control over the light that enters his eyes, it also has many facets of this ability that are very unique. The very first of witch is the ability to see things in diferent color spectrums ranging from infra-red to ultra-violet. Basicaly it can make bright things dim and dim things bright. Secondly by manipulating the light as it comes around obstacles one can, in effect, see around corners. It also gives the user night/heat/Xray vision. And the final facet of the Kowaregan is the ability to turn any surface, provided it meats specific criteria, into a mirror.

Trivia
The kanji for Kowaregan means Broken Eye.

This is the first doujutsu that isnt a kekkei genkai.

The iris segments of this doujutsu stay the same color as the users natural iris color.