Zenkotsu Swamp is a murky and treacherous expanse of wetlands. The air is thick with the stench of decay, and the sounds of buzzing insects fill the ears. The murky waters are teeming with dangerous creatures, and the thick, tangled vegetation hides any number of hazards. Despite its dangers, the swamp is said to hold great secrets for those brave enough to venture into its depths. The swamp is named after Zenkotsu, a notorious villain from the ninja era whose lair was believed to be located somewhere within its confines.