Gedoushu

The Gedoushu (外道衆 Gedōshū?) whose name roughly translates as "Heretic Party" are fictional characters, who are the antagonists from the 33rd Super Sentai Series Samurai Sentai Shinkenger. They are malevolent spirits living in the Rokumon Junk (六門船 Rokumonsen?) that sails along the Sanzu River (三途の川 Sanzu-no-kawa?) in the land of the dead, dependant on its waters for surival and cursed to be in state between life and death. Able to enter our world through cracks and narrow gaps, they set up a plan to terrorize humans in anyway possible so that the river overflows to point of flooding into the mortal realm in order for them to invade in full fury. Though defeated and sealed by the previous generation's Shinkengers, the Gedoushu reawaken in present time to resume their havoc, only to face the Shinkengers. In the world of Shinkenger, the Gedoushu are the basis of all the yōkai in Japanese mythology.