Jullov is a black metal project from Hudiksvall, Sweden, whose self-titled album (2016) features five instrumental parts of raw, atmospheric black metal. The extended compositions, culminating in a nearly eight-minute finale, deliver cold Scandinavian intensity through a purely instrumental framework.

Jumalhauta is a Finnish death metal band from Ylivieska whose releases including Yhdeksan Sairautta and Kuolinvirsi deliver crushing Scandinavian death metal. Their Finnish-language lyrics and raw approach to the genre place them firmly within the lineage of Finland's storied death metal tradition.

Jumalkyrpa is a provocative Finnish extreme metal band from Kristinestad whose transgressive album titles and irreverent approach to black and death metal set them apart in the underground. With five releases including Viva La Fucking Darkness! and Kristinuskon Raunioilla, they channel nihilistic aggression with deliberate shock value.

Jumping Jack is a French stoner rock trio from Nantes, delivering organic melodies built on a heavy rock wall since their debut Cows and Whisky (2009). They gained international exposure through a 25-date European tour in 2013 and have shared stages with Orange Goblin, Nashville Pussy, and Mustasch across three albums.

Jumpmeal is a metal project from Switzerland that fuses extreme metal aggression with experimental compositional approaches. The project explores the heavier end of the Swiss underground metal spectrum with unpredictable song structures and intense performances.

Jumpscare is a modern melodic death metal band from Naples, Italy, with an extensive discography of over 15 releases including Dear Mother and Rise And Fall. Their prolific output and active touring schedule have established them as a fixture of the Italian melodic death metal scene.

Juneau is a Belgian instrumental post-metal trio from Heist Op Den Berg, creating dark and heavy atmospheric music since their formation. With albums including 20/20 (2020), CLOAK (2021), and Scraps of the Final Lights (2025), the three-piece crafts immersive instrumental compositions blending doom, black metal, and post-rock elements.

Junkwolvz is a heavy metal and rock band from Athens, Greece, formed in 2019 and working toward their debut full-length album. Their singles including A Blackened Star and The Monster (2022) preview an energetic approach to riff-driven heavy music rooted in the Greek metal scene.

Junky is a heavy metal band from Ireland that delivers raw, aggressive compositions with a punk-inflected energy. Their approach to metal bridges the gap between heavy riffing and hardcore intensity within the Irish underground scene.