In July 2003, Erika successfully passed the Tsunku♂ Produce Hello! Project Shin Unit Audition. In August 2004, she joined the group called v-u-den with former Morning Musume member Rika Ishikawa and Hello! Project Egg Audition 2004 winner Yui Okada.
In early 2006 she joined the new Hello! Project kickball team Metro Rabbits H.P.
Miyoshi was cast as Kotomi Kanda in the Japanese film Sukeban Deka: Codename = Asamiya Saki, which was released on September 30, 2006.
|Show||Start date||End date|
|Majokko Rika-chan no Magical v-u-den (魔女っ娘。梨華ちゃんのマジカル美勇伝)||2004-10-04||2004-12-24|
|Musume Dokyu! (娘Dokyu!)||2005-04-06||2005-06-17|
|Program||Start date||End date|
|Hello Pro Yanen!! (ハロプロやねん!!)||2005-02-04||2005-03-18|
|TBC Fun Fīrudo Mōretsu Mōdasshu (TBC Funふぃーるど・モーレツモーダッシュ)||2005-08-08||2005-08-12|
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