Appearance: Kaijin is a Fuyutama, so it is speculated that he has gained all the Kekkai Genkai that a such a birth would have entailed. He was born in Kyoukoku from an unknown mother and Kami's father, who was a Fuyutama. Until Kami made his way to Kyoukokugakure Kaijin neither met or knew of his half brother. It would seem that he became a competent ninja through his fathers tutelage and knew him up to his death. Kaijin being the leader of the ANBU for many years and hopes to be the Kage someday. When Kami Fuyutama comes to Kyoukokugakure and is made kage instead of Kaijin, he hold a great deal of hate for his clansmen until it is found out that they are half brothers. It would seem that Kaijin has made a stronger bond with is cousin Kazeyo before Part II, which is shown when he follows him when he takes off to join Akatsuki.

Added (11.14.2009, 11:15 Am)
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http://narutofanon.wikia.com/wiki/Kaijin_Fuyutama