10 years before the Uchiha Clan Massacre by Itachi Uchiha. Shiyōkinshi was a talented Uchiha kid who was kidnapped by Orochimaru in an attempt to steal his Sharingan. Shiyōkinshi began to work for Orochimaru and in secret awakened his Sharingan due to the stress. But he kept it a secret from Orochimaru who locked him in his prison as a failed experiment for not awakening his Sharingan. Shiyōkinshi joined with Guren and became her assistant. While working with her, He met Kuchinawa Gekkō whom he integrated some of Orochimaru's cells, which he had collected in secret. After hearing the death of Orochimaru Shiyōkinshi awakened his Mangekyō Sharingan. He and Kuchinawa escaped the prisons and reached the Land of Iron, where he met Kiba Uchiha. the two Uchiha's faced each other in a long battle