Ninja Gaiden:Ikigaiki(にんじゃがいでん:いきがいき;lit mean. Ninja Side-Stories:Purpose Chronicles or commonly known as Ninja Gaiden:Ikigai Chronicles) is a spin off of the original Naruto manga series written by Masashi Kishimoto. This Spin off is written by Jaison Clinton Castelino and it follows the adventures of Kiba Uchiha and his organisation Ikigai in their quest for something they term a Purpose.