2002 was the year when Hello! Project Kids joined Hello! Project, Satoda Mai joined Country Musume, Sheki-Dol disbanded, Lehua graduated from Coconuts Musume and Hello! Project and Ishii Rika and Heike Michiyo graduated from Hello! Project
Singles
- 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:
- Ai~n Taisou / Ai~n! Dance no Uta - Minimoni with Shimura Ken
- Jinsei ga Mou Hajimatteru - Ichii Sayaka in CUBIC-CROSS (debut)
- 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
- 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
- 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
Albums
- January 1: First Kiss - Matsuura Aya (debut)
- March 27: 4th "Ikimasshoi!" - Morning Musume
- June 26: Minimoni Song Daihyakka 1 Kan - Minimoni (debut)
- August 21: Zenbu! Petitmoni - Petitmoni (debut)
- September 4: All of Tanpopo - Tanpopo
- November 20: C:BOX - Ichii Sayaka in CUBIC-CROSS (debut)
- December 18: Petit Best 3 - Hello! Project