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, and continued until all Seifuku Koujo Iinkai members graduated in 2006.

2002 Revival

 * Yoshida Kozue (吉田梢)
 * Hoshikawa Ririka (星川りりか)
 * Kawano Reina (河野伶奈)
 * Matsumoto Kumiko (松本久美子)
 * Tezuka Machiko (手束真知子)
 * Yamikoshi Chika (山越千歌)

1993-2000

 * Yoshida Mirai (吉田未来)
 * Tamura Chiaki (田村千秋)
 * Honda Hiroko (本田博子)
 * Kikuchi Ayako (菊地彩子)
 * Hashimoto Mika (橋本美香)
 * Uchida Emi (内田絵美)

Albums

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