Legendary Armor Samurai Troopers

Legendary Armor Samurai Troopers (鎧伝サムライトルーパー) is an anime franchise created by Sunrise. The original series was adapted and released in English under the name Ronin Warriors. Uncut versions of Legendary Armor Samurai Troopers and related media have been released in English as well.

Plot
Talpa, the demon lord of the Netherworld, is bent on conquering the mortal world. Standing against Talpa and his four Dark Warlords are the five Ronin Warriors, each in possession of mystical armor and weapons. They are assisted by Mia Koji, a young student-teacher, and a mysterious warrior-monk known only as The Ancient.