The Ruined Kingdom

From publisher blurb: When an enormous kaiju pursues a foreign army into Kaigaku, the Empire heeds the call for aid from their oldest allies. This campaign takes the PCs far from home to exotic vistas. Can you save the world from an onslaught of mutated beasts? This sandbox campaign features dozens of new creatures, 2 new classes, 9 new ryu and much more. Combine the dungeon generator in this book with the NPC generator in the Premium Edition of Kaigaku to keep the adventure going forever.