v-u-den was a Japanese pop group formed in August of 2004. The group consists of Ishikawa Rika (former member of Morning Musume), Miyoshi Erika (one of the winners of a Hello! Project audition in 2003), and Okada Yui (one of the winners of the Hello! Project Eggs Audition in 2004). This group's formation was announced around the time that Rika's graduation from Morning Musume was announced, and it was stated that after graduation, she would work full-time with Biyuuden.

In late 2004, they performed as part of Hello! Project All Stars. They also hosted the TV show Majokko Rikachan no Magical Biyuuden in 2004 and had their own radio show, v-u-den B.B.L. In early 2005, Erika and Yui released a photobook called "hello! x2". They released singles consistently since Rika's graduation, did a small tour in Singapore, and were one of the most active groups in Hello! Project up until 2008 when they ceased activity at the end of their summer concert. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.