The Kaiu Wall, also known as the Carpenter Wall or the Kaiu Miracle, for centuries was the very physical demarcation of the southern border of Rokugan. On its north side lie the lands of the Crab Clan, and on its south the River of the Last Stand separated it to the blighted reaches of the Shadowlands. It was here that the forces of Rokugan entrenched themselves in their eternal battle against the forces of Jigoku.