Kogan

The Kogan (子眼, kogan) is the kekkei genkai of the Midori clan. Its abilities are similar to that of the Byakugan, having originated from the famous "All seeing eye".

Abilities
Like the Byakugan, the users of the Kogan have the ability to see through objects at a certain range. But unlike the Byakugan, the Midori clan tend to specialize in long range combat, staying as far as possible from their opponent. This dojutsu allows the user to see with clearness any target, even if it is from a considerable distance. Many members of the clan have the ability to see approximately twenty kilometers, though it is seen that a few select members of the clan have surpassed that distance. While the Kogan does not possess the ability to block or open any of the 361 tenketsu points, those who utilize this eye can determine if their opponent is a mere clone and locate the original. This is true for all types of clones.

Trivia

 * While Kogan literally means 'Child Eye', that name is simply a shorter form of its other name 'the eye that is the child of the Byakugan'.