Jaldaboath is a folk metal band from England signed to Napalm Records, known for their intoxicating mix of metal, Middle Ages themes, and Monty Python-esque humor. Their debut The Rise of the Heraldic Beasts (2010) features galloping drums, catchy melodies, and sarcastic lyrics delivered through Sir Jaldaboath's distinctive clean vocals in a genre they've dubbed Templar metal.

Jarun is a black metal band from Krakow, Poland, blending progressive and folk elements into a distinctive style that sounds entirely their own. Their four albums from Wziemiozstapienie (2012) through Rok spokojnego slonca (2021) feature acoustic flourishes, progressive songwriting, and ferocious vocals, earning praise as a top-tier black metal act.

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.

Jotungrav is a Finnish progressive folk metal project centered on extended compositions about Nordic mythology examined through modern philosophical perspectives. Founded as a solo venture by singer/songwriter Matias Stenman, the project expanded in 2023 with drummer Matias Rokio, crafting ambitious tracks that stretch around the ten-minute mark.

Julian Lehmann is an independent Swiss composer who blends epic cinematic music with ethnic, folk, medieval, and metal elements. His releases including Keeper of the Wild and Home of Legends feature melodic and rhythmic compositions that merge orchestral grandeur with heavy guitar work.

Jormungand is a blackened pagan metal band from Cologne, Germany, blending black metal with epic folk passages and atmospheric keyboard arrangements. Their album Zwischenwelten (2018) was praised by ex-Heidevolk member Kevin Storm as an emotional dragonride through darkness, featuring bone-dry blastbeats paired with varied vocals and solid songwriting.