Joao Miguel is a Portuguese guitarist and composer from Almada who creates instrumental progressive metal and math rock. His album STONESUN (2018) and EP Geometric Winters (2015) showcase technical guitar proficiency and compositional complexity, blending clean shred with progressive and thrash metal influences.

Juan Martin JG6 is an instrumental metal guitarist from Terrassa, Spain, whose releases including The Fairy of Eagle Nebula and Guitar Farm showcase technical guitar work with cosmic and atmospheric themes. His compositions blend progressive metal precision with ambient and spacey textures.

Jubal is a heavy metal band from the Netherlands whose compositions channel aggressive energy through technically proficient performances. Their work contributes to the vibrant Dutch metal underground with powerful, riff-driven heavy music.

Judas Conspiracy Theory is an instrumental post-metal and progressive metal band from Athens, Greece, featuring heavy guitar-led hypnotic rock. Their albums Omni (2018) and Ad Solem (2025) were recorded at MD Recording Studios, delivering atmospheric instrumental compositions that merge post-metal weight with progressive complexity.

Judas Priest is one of the most influential heavy metal bands in history, formed in Birmingham, England in 1969. Fronted by Rob Halford's iconic vocal range and driven by the twin guitar attack of Glenn Tipton and Richie Faulkner, they helped define the sound and visual aesthetic of heavy metal with genre-defining albums like British Steel, Screaming for Vengeance, and Painkiller.

Judder is a heavy metal band from Poland that delivers grinding, intense compositions with an industrial edge. Their punishing approach to metal channels the abrasive energy of the Polish underground through relentless heaviness.

Jude Milk is the solo project of Acid Age guitarist from Ireland, whose instrumental debut album Kithara (2016) fuses metal with flamenco and jazz influences. The six-track record spans death metal, speed metal, and thrash metal shredding alongside unexpected acoustic and jazz detours.

Judge Minos is a heavy metal band from Wallisellen, Switzerland, formed in 2017 and featuring clean to high-pitched vocals paired with mighty guitar riffs. Their debut album The Keeper Of Imbalance (2020) was produced at Valhalla Sound Studio and has been praised as a must-listen for fans of traditional heavy metal with a modern approach.

Judgement is a metal band from Finland that delivers heavy, aggressive compositions drawing on the country's rich tradition of extreme and heavy music. Their work channels the intensity of Finnish metal through powerful performances and dark thematic content.