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.

Jaehzorn is a German black/thrash metal band whose album Weiderecht (2025) was released through Fucking Kill Records and features production by Deaf Chamber's Jan. Their four-piece lineup delivers aggressive blackened thrash with historical artistic elements, including woodcut designs from 1525 and handprinted linocuts on Nepalese paper in special editions.

Jaertecken is a Swedish metal band blending black metal and death metal with dark ambient, folk, and pagan elements. Their track Ett Satans Ar (2016) combines extreme metal with Nordic folk textures, creating atmospheric compositions steeped in traditional Scandinavian themes.

Jegzivatar is a melodic/atmospheric black metal solo project from Sopron, Hungary, founded in 2012 by Adrian Penzes. After going inactive in 2015 and reviving in 2018, the EP Misanthropia (2019) features guitar-driven atmospheric black metal with all lyrics sung in Hungarian.