There are at least 9 groups with the name H2O (not counting H₂O): 1. A melodic hardcore band from the United States 2. A pop rock band from Latvia 3. A hip hop duo from South Africa 4. An alias of Oliver Strumm 5. A rock band from Scotland 6. A hip-hop/dance group from Montenegro 7. A techno act from Norway 8. A progressive rock band from Italy 9. H2O was a Japanese folk/pop duo from Nagano Prefecture: Kenji Nakazawa(中沢賢司） and Masaki Akashio(赤塩正樹).