BOYSTYLE was a Japanese pop group, made up of members Yukina Kawada (川田由紀奈), Asami Tano (田野あさ美), Eri Murakawa (村川絵梨) and Kayoko Uehara (上原香代子). |Originally formed as ai☆ai in 2001, the group later changed their name to BOYSTYLE. They Released their first single Boys be Stylish! in 2002.|They’re well known for the song Kokoro No Chizu (ココロのちず), which was featured in the anime One Piece from 2004 to 2006.|They were also active as a part of BEE-HIVE project, kind of female pop artists organization like Hello! Project, founded by Amuse Inc. in 2003. These are the another artists who were involved with the project: BUZY, Perfume and Tiara Kiyuna (喜友名星).|In 2005, Yukina left the group for an unclear reason.|BOYSTYLE disbanded in July 2007.|Yukina and Kayoko went on to form dance pop group MANSAKU with former BUZY members Nao, Mayumi and Mao. |