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.

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.

Just is a heavy metal band from Hungary that delivers aggressive, hard-hitting compositions rooted in the Central European metal tradition. Their approach to heavy music channels the energy and intensity that characterizes Hungary's growing metal scene.

Just Before Dawn is a Swedish death metal band whose military-themed approach to the genre delivers mid-tempo destruction with ruthless efficiency. Their album Battle-Sight Zeroing channels combat imagery through crushing riffs and aggressive vocals, earning them a dedicated following in the Swedish death metal underground.

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.

JustDrunk is a Russian metal and thrash punk band whose album Gipnodich (2016) delivers eight short, explosive tracks of aggressive crossover metal. Their fast, punishing compositions channel raw thrash energy through a punk-influenced framework.

Justice Theory is a melodic heavy metal and thrash metal band from Jyvaskyla, Finland, releasing through Inverse Records. Their consistent output of singles including Fireborn (2023) and This is Our War (2025) demonstrates a polished blend of melodic sensibilities with heavier thrash elements characteristic of the Finnish metal sound.

Justify is a thrash metal band from Germany that delivers fast, aggressive riffing rooted in the classic Teutonic thrash tradition. Their uncompromising approach to the genre channels the intensity of Germany's rich thrash metal heritage.