Jerna is a folk metal band from Krakow, Poland, that blends heavy guitar riffs with atmospheric folk instruments including hurdy-gurdy, flutes, and whistles. Their album Cmy (2022) draws on Slavic culture and mythology, featuring dual vocals and traditional instrumentation woven into a modern metal framework.

Jernlov is a black metal band from Norway that channels the cold intensity of Scandinavian extreme metal through raw, aggressive compositions. Their work draws on Norway's legendary black metal heritage, delivering atmospheric and punishing music.

Jersey is a heavy metal band from Croatia that channels aggressive energy through their compositions. Their approach to metal draws on both Central European and Mediterranean influences, contributing to the growing Croatian heavy music scene.

Jesajah is a blackened death metal band from the Tyrol region of Austria, formed in 2022. Despite their recent formation, they have already released albums including Legion and The Impaler Part II (Satanic Stronghold), delivering intense and dark extreme metal rooted in the Austrian underground.

Jeshaia is a black metal project from Belgium, delivering atmospheric and aggressive extreme metal. The project channels dark sonic landscapes through the lens of Belgian underground black metal traditions.

Jester Beast is a thrashcore band from Turin, Italy, formed in 1983 and known for evolving from power/speed metal into crazily fast thrashcore blending Italian hardcore with Voivod-esque riffs. Their 1988 demo was significant enough for Nuclear Blast Records to feature three tracks on a compilation, and The Lost Tapes Of... Poetical Freakscream (2018) remastered that overlooked Italian thrash gem.

Jester Ghost is a power metal project from Milan, Italy, oriented toward the most traditional aspects of the genre with positive energy and fantasy themes. Created by the two-decade collaboration of Alex Marcomini and multi-instrumentalist Dave Gardoni, their albums Tales of the Ancient Gold and From Hell and Back channel classic power metal spirit.

Jester Majesty is a progressive/technical metal project from Italy influenced by Control Denied, Death, Psychotic Waltz, and Watchtower. Their debut concept album Infinite Measure, Finite Existence (2025) explores the tension between humanity's pursuit of knowledge and its biological limits through intricate compositions mixed at BMM Studios in Bulgaria.

Jesters is a heavy metal band from France that delivers energetic, riff-driven compositions with a theatrical flair. Their approach to classic heavy metal brings a distinctly French sensibility to the genre's bombastic traditions.