Jechane is a Polish metal band from Tuczno whose debut album War in Your Head (2016) delivers thrash, death, and progressive metal with heavy growl vocals and thrashy guitars. Recorded at Szafa Records Studio, the album features thirteen tracks exploring themes of mental conflict and psychological darkness.

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.

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.

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.

Jesus Chrusler Supercar is a death n roll band from Stockholm, Sweden, whose diabolical fusion of grinding death metal with blues-rock swagger has been described as Motorhead on four wheels. Their releases from Among The Ruins (2013) through the Rising EP (2023) deliver wrecking ball riffs and grimy, filthy production, earning them over 100 supporters on their latest release.

Jesusatan is a death metal and grindcore band from Croatia whose provocative name matches their aggressive musical approach. Their extreme metal blends death metal brutality with grindcore intensity, delivered through short, punishing compositions.

Jihad is a heavy metal band from Poland that delivers aggressive, confrontational compositions with dark thematic content. Their uncompromising approach to extreme metal channels raw intensity through punishing riffs and powerful performances.

Jim T is the solo project of Dimitar Todorov from Kavala, Greece, former guitarist and drummer of the black metal band Mold of Tree. His releases including Deadly Nature feature original metal instrumentals alongside covers of Septicflesh and Gojira, showcasing his versatility across extreme metal styles.

Joda Cema is a death/groove/thrash metal band from Bournemouth, UK, who have been taking the bullshit out of metal since 2004. Their humorously titled album David Hasselhoff's Top 50 Power Ballads (2016) belies the serious heaviness of their death and thrash metal compositions.