- January 6
- Yanagawa Nanami (2002)
- January 7
- Sato Ayano (1995)
- Ishida Ayumi (1997)
- Aoki Yuna (2014)
- January 10
- Wú Sīxuán (1988)
- January 11
- Junjun (1988)
- January 12
- Mitsui Aika (1993)
- January 14
- Mogi Minami (1999)
- January 16
- Qiū Cuìlíng (1994)
- January 19
- Ishikawa Rika (1985)
- Ise Layla (2004)
- January 20
- Yaguchi Mari (1983)
- January 23
- Onoda Karin (2008)
- January 27
- Hirano Tomomi (1984)
- January 30
- Kobayashi Azusa (1977)
- Ebata Kisaki (2007)
- January 31
- Muto Mika (1992)
