Jeddah is a heavy metal band from the United Kingdom that brings a dark, intense approach to British heavy music. Their aggressive compositions draw on the UK's deep tradition of heavy and extreme metal.

JEEL is a death metal band from Copenhagen, Denmark, whose album As Morning Turns To Day (2017) features twelve tracks of heavy, crushing death metal. The band's approach blends traditional death metal brutality with dynamic songwriting across a 50-minute runtime released through Slovak Metal Army and Immortal Souls Productions.

Jeer is a depressive and melodic black metal solo project from Torun, Poland, spontaneously formed in early 2011 by Dreamerion as an outlet to get rid of suffering. Their album Burden of Life (2011) features eight tracks of raw, emotionally charged black metal that prioritizes authentic expression over polished production.

Jegulja is a rock and metal band from Ljubljana, Slovenia, featuring a baritone guitar-driven sound with multiple albums including Anguilla Guerrilla and Exit Sandman. The three-piece has been active since at least 2013, cycling through several drummers while maintaining their heavy, low-tuned approach to Slovenian underground rock.

Jena is a southern metal band from Brescia in northern Italy, formed in 2013 and describing themselves as a southern metal band from northern Italy. After nearly dissolving in 2018, they reconstituted with a new lineup and have since released Graboid (2021) and Outlaw (2023), delivering groove-heavy, riff-driven southern metal.

Jenner is a heavy/thrash metal band from Belgrade, Serbia, formed in 2013 and delivering energetic, riff-driven metal. Their releases including Prove Them Wrong and To Live Is To Suffer channel classic thrash aggression through a tightly wound Serbian metal sound.

Jenova is a death metal band from Dublin, Ireland, performing since November 2015 and bringing intense extreme metal to the Irish live circuit. Their EP The Less You Know, The More You Sleep (2017) and single Nail the Eye channel crushing death metal aggression through a tight, punishing sound.

Jeremiah is a heavy metal band from Sweden that delivers powerful, riff-driven compositions rooted in Scandinavian metal traditions. Their approach to the genre channels the energy and technical proficiency that characterizes Sweden's celebrated metal scene.

Jerk is a thrash metal band from Switzerland that delivers aggressive, high-energy metal with a raw and confrontational edge. Their stripped-down approach to thrash draws on the intensity of the genre's classic era while maintaining a distinctly Swiss underground identity.