1997 Happenings
- 13 born
- 2 new singles
- 1 new leaders
- 1 new groups
- 5 joined groups
- 6 new idols
January 1997
- 7 Ishida Ayumi is born
April 1997
- 21 Takagi Sayuki is born
May 1997
- 7 Maeda Irori is born
June 1997
- 4 Nakanishi Kana is born
July 1997
- 1 Kaneko Rie is born
- 3 Hashimoto Nagisa is born
- 7 Ikuta Erina is born
August 1997
- 31 Heike Michiyo joins Hello! Project
September 1997
- 8 Nakazawa Yuuko joins Hello! Project
- 8 Iida Kaori joins Hello! Project
- 8 Ishiguro Aya joins Hello! Project
- 8 Abe Natsumi joins Hello! Project
- 8 Fukuda Asuka joins Hello! Project
- 14 Nakazawa Yuuko becomes leader of Morning Musume｡
- 14 Morning Musume｡ is formed
October 1997
- 14 Yamaki Risa is born
November 1997
- 3 Morning Musume｡ releases “Ai no Tane”
- 5 Heike Michiyo releases “GET”
- 19 Arai Manami is born
- 19 Kosuga Fuyuka is born
- 23 Takeuchi Akari is born
December 1997
- 24 Tanaka Karen is born
- 27 Inaba Manaka is born