Jubal is a heavy metal band from the Netherlands whose compositions channel aggressive energy through technically proficient performances. Their work contributes to the vibrant Dutch metal underground with powerful, riff-driven heavy music.

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.

Junon is a German black metal collective uniting musicians with decades of experience in bands such as Hidden in the Fog, Imha Tarikat, and Temple Koludra. Their 2025 Promo MMXXV blends traditional black metal with psychedelic elements and prominent female vocals, sung in German and Latin, and ranked on Machine Music's Best Metal of 2025 list.

Juodvarnis is a progressive metal band from Vilnius, Lithuania, whose Lithuanian-language albums including Tekmes and Nerimo Dienos explore heavy music through a distinctly Baltic lens. The band performs at major festivals including Kilkim Zaibu and maintains an active presence in the Lithuanian metal scene.

Just Darkness is a Russian depressive black metal project signed to Niflhel Records, channeling nihilistic sorrow expressed through cold melodies. Their self-titled debut EP (2020) delivers five tracks of atmospheric DSBM across a limited CD jewel case pressing of 300 copies, featuring the anonymous duo of S. on vocals and K. on composition.

JvlKvlt is a German depressive post-black metal project whose debut album Worshipping Darkness (2023) channels melancholic atmospherics through layers of tremolo guitar and anguished vocals. The project blends post-rock textures with raw black metal aggression, creating a sonic landscape of bleak introspection.

Jaatyakuu, meaning Frostmoon, is a Hungarian one-man raw black metal project driven by strong nostalgia for the music and long winters of the 1990s. Despite being Hungarian, the artist sings in Finnish for its suitability to the genre, with the demo EP Fagyhold (2020) channeling a Burzum Filosofem-inspired raw yet beautiful atmosphere.