v-u-den (美勇伝, Biyūden) (also romanized Biyuuden, Viyuden, or Biyuden) was a Japanese pop group within Hello! Project. The group was formed in August 2004 and consists of members Rika Ishikawa (Morning Musume), Erika Miyoshi, and Yui Okada, with Ishikawa being the leader. The name means: beauty (美, bi), bravery (勇, yū), and legend (伝, den). The group officially disbanded on June 29, 2008 after their last concert during their v-u-densetsu 5 tour.
In June 2009, v-u-den was revived as Zoku v-u-den, consisting of Sayumi Michishige, Risako Sugaya and Junjun and released a new song, "ONLY YOU", on a Hello! Project compilation and continued activities until 2011, though Zoku v-u-den briefly appeared during a Hello! Project concert in early 2013 alongside Rika Ishikawa.