Jizzlobber is a sludge rock band from Colmar, France, whose self-described sound combines sludge rock and roll with space and doom chunks. Their self-titled album (2012) delivers five tracks of grimy, fuzzed-out heaviness that merges stoner rock groove with crushing sludge and spacey atmospherics.

Jorogumo is a Scottish metal band named after the shape-shifting spider demon of Japanese folklore, creating dark and atmospheric heavy music. Their releases including Babylon and the Rot EP channel a deliberately ominous aesthetic through heavy, textured compositions.

Joseph is a heavy metal band from the United Kingdom that delivers powerful, riff-driven compositions rooted in British metal traditions. Their approach to the genre channels the energy and intensity of the UK's rich heavy metal heritage.

Jurassic Leaf is an instrumental doom/sludge/stoner metal band from Lille, France, whose album Groovosaur (2016) delivers six tracks of crushing, groove-oriented instrumental metal. Their prehistoric-themed compositions have earned praise as an instrumental juggernaut of captivating, eye-melting chugs.

JWH is a sludge metal band from Vladivostok in Russia's Far East, founded in 2015 and exploring themes of drug addiction and societal decay in their hometown. Their debut album Gidra (2022) blends destructive bass and apocalyptic guitars with barbarian vocals, drawing comparisons to Grief, Conan, and Triptykon.

Swedish four-piece from Helsingborg crafting immersive post-metal and sludge, active since 2020 with releases including The Pandemic Sessions, Phantom Centre, and a 2025 self-titled album on These Hands Melt. Their extended compositions build from atmospheric tension to crushing heaviness, earning them spots at Sweden Rock Festival.

Doom/sludge metal band from Toulouse in southwestern France, formed in 2023 and delivering crushing, low-tuned heaviness from the Pink City. Their deliberately archaicized name adds a dark, medieval atmosphere to their modern sludge.

A product of Ukraine's battle-tested metal underground, this Chernihiv-based doom metal, sludge metal, and stoner metal act channels desert-baked tonality and psychedelic haze over lumbering rhythms. Active since 2019, their catalog reveals a band unafraid to explore the darker corners of heavy music.

Dortmund-based sludge/death metal/grindcore outfit formed in 2018, delivering a filthy fusion of the heaviest extreme metal subgenres. Their confrontational name matches their uncompromising approach to sonic punishment.