GReeeeN

Gre4n Boyz (stylized as GRe4N BOYZ), until March 2024 named Greeeen (stylized as GReeeeN), is a Japanese all-male vocal group from Kōriyama in Fukushima Prefecture, comprising the four members: HIDE, navi, 92 (read as "kuni"), and SOH. They debuted with Universal Music Japan in 2007. Their previous logo depicts a mouthful of teeth, with the four "e" representing both the number of members and their dental background, as all of them graduated from the Faculty of Dentistry. Sound production is overseen by HIDE's older brother JIN, formerly a guitarist of Pay money To my Pain. Their official catchphrase, according to their Universal Music Japan website, is "Rock 'n' Breakbeat with four microphones." All members of Gre4n Boyz attended the dentistry department at Ohu University in Koriyama City, Fukushima Prefecture. Notably, the group debuted while still students in 2007. By 2010, each member had obtained a dental license and commenced practicing dentistry in Kōriyama. In 2019 they were appointed as 'Frontier Ambassadors' for Kōriyama city, highlighting their significant contributions to the local community. A defining characteristic of Gre4n Boyz is their steadfast commitment to anonymity. Throughout their career, none of the members have ever revealed their faces in any public appearances, be it in promotional videos, CDs, television performances, or online platforms. This dedication to secrecy was particularly evident during their sole TV performance on TV-U Fukushima's Music Bar Palo Palo, broadcast on January 19, 2007, where the group took measures to censor their faces. Despite their immense popularity, the identities of the members remain shrouded in mystery. Initially, there were indications that they might unveil their faces after all members passed the 2009 dental license exam. However, by late 2009, they firmly stated their intention to maintain anonymity to protect their careers as dentists from potential interference. As a result, Gre4n Boyz's faces have never been made public, fueling speculation and curiosity among fans about the individuals behind the music.