Yamiror is a Nighlok monster debuting in the Power Rangers Samurai episode "A Fish Out of Water". He is voiced by Peter Gentil.
Created when lightning struck toxic waste, Yamiror has bad breath that can turn people unconscious and is armed with a fan sword. He also had eye beams and a fog breath. While Kevin was out fishing for the Swordfish Zord, Yamiror's breath took out the rest of the Samurai Rangers. Returning to fight the Nighlok, Kevin comes back after spending time with a fisherman to catch the Swordfish Zord. Using its power, it took away Yamiror's stench. He was defeated by the Samurai Swordfish Cannon Blaster and then he was defeated again by the Swordfish Fencer Megazord. He later reappears in "Party Monsters" where he is amongst the deceased Nighloks attending their Halloween party in Nighlok Heaven.
- Yamiror appears in Power Rangers Samurai SMASH! as one of the three recurring bosses. His attack involves toxic gas that takes up the half of the screen where he is situated.
- He shares his voice actor with another fellow Nighlok, Desperaino.
- Yamiororo, his Super Sentai counterpart in Samurai Sentai Shinkenger.