In the sequel Ninja Gaiden 2, Murai is mentioned in one of the fallen Black Spider ninja's notebook, havig killed the clan leader Genshin's younger brother, leading to the latter's hatred of him and members of the Dragon Lineage as well.
In the sequel Ninja Gaiden 2, Murai is mentioned in one of the fallen Black Spider ninja's notebook that Ryu Hayabusa picks up in his quest. It is written that he killed the clan leader Genshin's younger brother, leading to the latter's hatred of him and members of the Dragon Lineage as well.