- Name: Earth Release: Swamp of the Underworld (土遁・黄泉沼, Doton: Yomi Numa, English TV "Earth Style: Dark Swamp)
- Type: A-Rank, Offensive, All Ranges
- Users: Jiraiya
- Hand Seals: Pig, Tiger
Earth Release: Swamp of the Underworld, is a technique that creates a large swamp that immoblizes and kills the target. However the size of the swamp is proportioned to the amount of chakra of the user, as when Jiraiya was drugged and had his chakra blocked, he only had enough chakra to get one of Orochimaru's snakes stuck when it should have been killed.