Thousand Years of Darkness (or simply "KYD") was an alternate timeline in which Fu Leng was victorious on the Second Day of Thunder. This pocket reality was found somewhere within the depths of the Dream Realm, given existence by the power of the dreams of Fu Leng. There was only a limited amount of contact with the true Rokugan of Ningen-do: Ashura came from this place, and Asako Kinuye was able to dream about it. An alternate version of Daidoji Uji was transported through a portal to Ningen-do.