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- January 2: Satoda Mai joins Country Musume.
- January 6: Yanagawa Nanami is born.
- January ??: Sheki-Dol disbands.
- February 10: Ozeki Mai is born.
- February 17: Lehua Sandbo graduates from Coconuts Musume and Hello! Project.
- March 7: Haga Akane is born.
- May 10: Funaki Musubu is born.
- June 3: Umeda Erika, Shimizu Saki, Yajima Maimi, Tsugunaga Momoko, Tokunaga Chinami, Murakami Megumi, Sudo Maasa, Natsuyaki Miyabi, Ishimura Maiha, Kumai Yurina, Nakajima Saki, Sugaya Risako, Suzuki Airi, Okai Chisato & Hagiwara Mai join Hello! Project as Hello! Project Kids.
- June 23: Maeda Kokoro is born.
- July 29: Akiyama Mao is born.
- September 23: Goto Maki graduates from Morning Musume.
- October 7: Ono Kotomi is born.
- October 9: Kanatsu Mizuki is born.
- October 13: Toda Rinne graduates Country Musume and Hello! Project.
- October 28: Saito Madoka is born.
- October??: Gomattou is formed.
- November??: 4KIDS is formed.
- November 5: Yamazaki Yuhane is born.
- November 7 : Heike Michiyo graduates from Hello! Project.
- December 17: Hibi Marina is born.
- December 21: Aiko is born.
- December 23: Ishii Rika graduates from Hello! Project.
- January 30: Minimoni Hinamatsuri! / Mini Strawberry Pie - Minimoni
- February 6: ♡Momoiro Kataomoi♡ - Matsuura Aya
- February 14: Saa! Koibito ni Narou - Melon Kinenbi
- February 20: Souda! We're ALIVE - Morning Musume
- February 21: Tokyo, Yoimachigusa. - Maeda Yuki
- March 13: Aenai Nagai Nichiyoubi - Fujimoto Miki (debut)
- April 17: Iroppoi Onna ~SEXY BABY~ - Country Musume ni Ishikawa Rika
- April 24:
- May 9: Te wo Nigitte Arukitai - Goto Maki
- May 29: Yeah! Meccha Holiday - Matsuura Aya
- June 5: Murasaki Shikibu - Heike Michiyo
- June 12: Sotto Kuchizukete Gyutto Dakishimete - Fujimoto Miki
- June 19: Natsu no Yoru wa Danger! - Melon Kinenbi
- June 26: Morning Musume Single Medley ~Hawaiian~ - Takagi Boo and Morning Musume, Coconuts Musume, Fujimoto Miki, Ishii Rika
- July 3:
- July 17: Shitsuren LOVE Song - Ichii Sayaka in CUBIC-CROSS
- July 24: Do it! Now - Morning Musume
- August 21: Yaruki! IT'S EASY - Goto Maki
- August 28: Tokyo Bijin - Nakazawa Yuko
- September 4: Romantic Ukare Mode - Fujimoto Miki
- September 11: Todoke! Koi no Telepathy - Ichii Sayaka in CUBIC-CROSS
- September 19: The Bigaku - Matsuura Aya
- September 26: BE HAPPY Koi no Yajirobee - Tanpopo
- October 23: Kousui - Melon Kinenbi
- October 30: Koko ni Iruzee! - Morning Musume
- November 13: BYE BYE Saigo no Yoru - Country Musume ni Ishikawa Rika
- November 17: Boyfriend - Fujimoto Miki
- November 20: SHALL WE LOVE? - Gomattou
- November 27:
- Genki Jirushi no Oomori Song / Okashi Tsukutte Okkasui~! - Minimoni & Takahashi Ai + 4KIDS
- Ai no Merry Christmas - Itsuki Hiroshi, Horiuchi Takao, Hello! Project Seikatai
- December 4: Minihamus no Kekkon Song - Minimoni
- December 11: Sougen no Hito - Matsuura Aya
- December 18: Sans Toi Ma Mie / Kimi to Itsumademo - Goto Maki
- January 1: First Kiss - Matsuura Aya (debut)
- February 20: The Douyou Pops 2 Haru no Uta Shuu - Hello! Project
- March 27: 4th "Ikimasshoi!" - Morning Musume
- May 22: Folk Songs 2 - Nakazawa Yuko, Melon Kinenbi, Matsuura Aya, Ishii Rika
- June 5 - The Douyou Pops 3 Natsu no Uta Shuu - Hello! Project
- June 26: Minimoni Song Daihyakka 1kan - Minimoni (debut)
- July 10: Hawaiian de Kiku Morning Musume Single Collection - Takagi Boo and Morning Musume, Coconuts Musume, Fujimoto Miki, Ishii Rika
- August 21: Zenbu! Petitmoni - Petitmoni (debut)
- September 4: All of Tanpopo - Tanpopo
- September 4: The Douyou Pops 4 Aki no Uta Shuu - Hello! Project
- November 20: C:BOX - Ichii Sayaka in CUBIC-CROSS (debut)
- December 18: Petit Best 3 - Hello! Project
- January 2 – February 17: Hello! Project 2002 ~Kotoshi mo Sugoizo!~
- March 20 – April 15: Morning Musume CONCERT TOUR 2002 Haru "LOVE IT ALIVE!"
- March 30 – June 2: Matsuura Aya First Concert Tour 2002 Haru "First Date"
- July 13 – July 28: Hello! Project 2002 ~ONE HAPPY SUMMER DAY~
- August 3 – September 23: Morning Musume CONCERT TOUR 2002 Natsu "LOVE IS ALIVE!"
- October 26 – November 30: Morning Musume CONCERT TOUR 2002 Aki "LOVE IS ALIVE!"
- November 1 – November 7: Heike Michiyo "Sotsugyou Memorial Live"
- January 28: Morning Musume's Major Debut 4th anniversary
- September 14: Morning Musume's Formation 5th anniversary
|1992 ・・ 2001 ・ 2002 ・ 2003 ・・ 2012|
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