Elfensjón (エルフェンシオン, Erufenshion) is a Japanese doujin music circle founded by metal composer Keisuke Kurose and mangaka/illustrator Kachiru Ishizue in the end of 2018.
[6][7] After releasing their third full-length album Zenith in April 2024, the project was announced to perform the third ending theme song for the anime series Why Does Nobody Remember Me in This World?
According to Tobias Dahs who reviewed Ephemera for German metal webzine Powermetal.de the sound of the project is influenced by the participating guest members and calls the opener Wiegenlied a strange mixture of J-pop, Babymetal and symphonic tunes while describing the tracks Hrafntinna, Fallen and Undead Sin as an alternative rock trilogy with straight forward and understandable song structures.
[11] Calder Dougherty of Heavyblogisheavy wrote that the guitar playing style is influenced by international progressive and speed metal acts like DragonForce, TesseracT and Periphery.
The musical repertoire of the group ranges between tearfull piano and guitar passages, djent-like anime bangers to large ragtime songs, which would even Between the Buried and Me make quit.