Mitsuoka Masami

 (光岡昌美) is a former singer, and former member of Sister Q as MASAMI. She was known for her lyrics about social withdrawal, coming from her own experiences as a hikikomori.

She changed her stage name to Mizca in October 2009 and stopped writing her own lyrics due to anxiety about performing her words in front of other people. On October 14, 2011, she returned to using her real name and writing her lyrics.

Albums

 * [2009.01.28] Black Diary
 * [2010.07.21] ♡UFUFU♡ (as Mizca)
 * [2012.01.11] PAST TRUNK

Singles

 * [2007.11.28] Hana
 * [2008.08.06] Distance Love / I am
 * [2008.11.19] Todokanai Omoi... ~Road another story~ (届かない想い...〜ロードanother story〜)
 * [2008.12.17] last cross
 * [2009.02.11] FREE BIRD
 * [2010.01.20] Kirakira☆ (キラキラ☆) (as Mizca)
 * [2010.06.02] Dame yo♡ (ダメよ♡) (as Mizca)
 * [2011.03.09] 1925 (as Mizca)
 * [2011.06.15] Lafiora (Joshi Key Version) (らふぃおら（女子キーバージョン）) (as Mizca)
 * [2014.12.10] say hello good days

Digital Singles

 * [2009.10.28] Robotics (as Mizca)
 * [2010.12.04] Hoshi no Tsubutsubu (星のつぶつぶ) (as Mizca)
 * [2011.12.14] OUT of STEP
 * [2012.04.11] LOVE BRACE
 * [2012.11.28] Hajimari no Hi (はじまりの日)
 * [2013.03.13] Nijiiro no Hana (虹色の花)