Spectreman Heroes: Lion Maru #1

Kosuke is on a mission to find his father's master. When attacked by Skull Ninjas he is saved by a shinobi named Shishimaru who transforms into Lion-Maru. Shishimaru tells Kosuke the Master has been killed and Gossun the Fiend Lord's minions are purging the land of his followers. Shishimaru and Kosuke go to save Kosuke's father but are to late. So Kosuke goes with Shishimaru to face Gossun the Fiend Lord.