4-Nin 1-Kumi

 (4人1組; 1 Group of 4 People), was a Japanese idol group active from around 1993 to 2006. They were a sub-unit of Seifuku Koujo Iinkai.

4-Nin 1-Kumi originally disbanded in 2000, but were revived with new members in May 2002. It is unknown when this incarnation disbanded, but it presumably happened when all SKi members graduated in 2006.

2002 Revival

 * Tezuka Machiko (2002-2003)
 * Yoshida Kozue (2002-2005)
 * Kawano Reina (2002-2005)
 * Matsumoto Kumiko (2002-2005)
 * Yamikoshi Chika (2002-2005)
 * Hoshikawa Ririka (2002-2006)

1993-2000

 * Yoshida Mirai (1993-1995)
 * Tamura Chiaki (1994-1996)
 * Matsumoto Miyuki (1994-1997)
 * Honda Hiroko (1994-1999)
 * Kikuchi Ayako (1995-1998)
 * Hashimoto Mika (1995-2000)
 * Uchida Emi (1995-1998)

Albums

 * 1) [1997.02.01] Jiyuu ni Ikiyou (自由に生きよう)