Kotetsu is a male character featured in Spectrobes: Origins. He lives on Wyterra and makes weapons for a living, working at his forge in Haven Village with his assistant. If Rallen and Jeena bring him enough minerals, he will make them a new weapon.
- Cosmo Lance - Free, after installing Incubator expansion cube on the Patrol Cruiser
- Cosmo Glove - 50 Blue Minerals, after defeating Galgore
- Cosmo Shield - Show Kotetsu a Sabo, Zeni and Tobasu after defeating Drilzon (the Child Spectrobe must be active when talking to him for it to be "seen")