As the Kami created the Empire of Rokugan, the fallen Kami Fu Leng created the Shadowlands. The Shadowlands is the wasteland that lays to the southwest of Rokugan, a twisted, nightmarish place corrupted by the power of Jigoku, the Realm of Evil.
When Fu Leng fell from heaven he left a crater known as the Festering Pit deep within the Shadowlands. It was from here that the Taint spread out, blighted, and corrupted the land. This was also where demons and evil spirits could cross freely from Jigoku into Ningen-do. The Shadowlands is a constantly shifting and uninhabitable nightmare come to life. It is home to oni, ogres, trolls, goblins, the Lost and countless other vile creatures.
The Crab Clan holds the forces of the Shadowlands at bay along the Kaiu Wall.