2001 Happenings
- 8 new albums
- 8 born
- 42 new singles
- 11 joined groups
- 8 new idols
- 2 graduations
- 3 new groups
- 1 retirements
- 1 new leaders
- 1 ex-leaders
- 1 left groups
January 2001
- 1 Maeda Yuki releases “Toukyou You Turn”
- 17 Minimoni｡ releases “Minimoni｡ Jankenpyon! / Haru Natsu Aki Fuyu Daisukki!”
- 31 Morning Musume｡ releases “Best! Morning Musume｡ 1”
February 2001
- 1 RuRu becomes a soloist
- 2 Makino Maria is born
- 7 Heike Michiyo releases “Kekkyoku Bye Bye Bye”
- 14 Tsuji Nozomi releases “NON STOP”
- 14 Ishikawa Rika releases “Rikaishite! ＞ Onna no Ko”
- 14 Nakazawa Yuuko releases “Yu・u・wa・ku”
- 14 Yasuda Kei releases “LOVE ーKeisan Chigaiー”
- 14 Gotou Maki releases “Gochamaze LOVE”
- 14 Yoshizawa Hitomi releases “「Yoshite､ Yoshite...」”
- 14 Abe Natsumi releases “Manatsu no Tanjoubi”
- 14 Yaguchi Mari releases “Marine Sports!”
- 14 Kago Ai releases “Renai tte Naani?”
- 14 Iida Kaori releases “Anata no Kami no Kaori”
- 15 Nakazawa Yuuko releases “Kuyashi Namida Porori”
- 21 Tanpopo releases “Koi wo Shichaimashita!”
- 26 RuRu releases “Meili Xinqing”
- 28 Pucchimoni releases “BABY! Koi ni KNOCK OUT!”
March 2001
- 1 Suenaga Mami joins Sheki-Dol
- 1 Suenaga Mami joins Hello! Project
- 7 Melon Kinenbi releases “Denwa Matteimasu”
- 8 Wada Sakurako is born
- 28 Gotou Maki becomes a soloist
- 28 Gotou Maki releases “Ai no Bakayarou”
April 2001
- 1 Ishikawa Rika joins Country Musume｡
- 11 Matsuura Aya becomes a soloist
- 11 Matsuura Aya releases “Dokki Doki! LOVE Mail”
- 11 Matsuura Aya joins Hello! Project
- 13 Sheki-Dol releases “Tetteiteki Unmei”
- 15 Nakazawa Yuuko steps down as leader of Morning Musume｡
- 15 Nakazawa Yuuko leaves Morning Musume｡
- 16 Iida Kaori becomes leader of Morning Musume｡
- 18 Nakazawa Yuuko , Tanpopo , Pucchimoni and Minimoni｡ release “Together -Tanpopo・Pucchi・Mini・Yuuko-”
- 18 Country Musume｡ releases “Hajimete no Happy Birthday!”
- 18 Ishii Rika releases “Yumemiru Chikara”
- 28 Takemura Miu is born
- 30 Danielle DeLaunay retires from show business
- 30 Danielle DeLaunay leaves Hello! Project
May 2001
- 1 Sannin Matsuri is formed
- 1 10nin Matsuri is formed
- 1 7nin Matsuri is formed
- 7 Danbara Ruru is born
- 28 Sasaki Rikako is born
June 2001
- 13 Matsuura Aya releases “Tropical Koishiteeru”
- 27 Sheki-Dol releases “Zentaiteki ni Daisuki desu｡”
July 2001
- 4 10nin Matsuri releases “Dancing! Natsu Matsuri”
- 4 7nin Matsuri releases “Summer Reggae! Rainbow”
- 4 Sannin Matsuri releases “Chu! Natsu Party”
- 17 Inoue Rei is born
- 25 Morning Musume｡ releases “The☆Peace!”
August 2001
- 1 Inaba Atsuko , Heike Michiyo , Morning Musume｡ , Coconuts Musume｡ and Melon Kinenbi release “Morning Musume｡ no Musical LOVE Century〜Yume wa Minakerya Hajimaranai〜 (Original Cast Ban)”
- 1 Nakazawa Yuuko releases “Futarigurashi”
- 5 Arai Saki joins Sheki-Dol
- 5 Ooki Ibuki leaves Hello! Project
- 5 Arai Saki joins Hello! Project
- 22 Coconuts Musume｡ releases “Jounetsu Yuki Miraisen”
- 26 Saitou Kana is born
- 26 Takahashi Ai joins Hello! Project
- 26 Niigaki Risa joins Morning Musume｡
- 26 Ogawa Makoto joins Morning Musume｡
- 26 Konno Asami joins Morning Musume｡
- 26 Takahashi Ai joins Morning Musume｡
- 26 Konno Asami joins Hello! Project
- 26 Ogawa Makoto joins Hello! Project
- 26 Niigaki Risa joins Hello! Project
September 2001
- 5 Matsuura Aya releases “LOVE Namidairo”
- 12 Minimoni｡ releases “Minimoni｡ Telephone! Ring Ring Ring / Minimoni｡ Bus Guide”
- 19 Gotou Maki releases “Afurechau... BE IN LOVE”
October 2001
- 1 Ishii Rika becomes a soloist
- 1 Ishii Rika joins Hello! Project
- 11 Melon Kinenbi releases “This is Unmei”
- 17 Country Musume｡ releases “Koibito wa Kokoro no Ouendan”
- 31 Morning Musume｡ releases “Mr. Moonlight〜Ai no Big Band〜”
November 2001
- 7 Heike Michiyo releases “Propose”
- 14 Pucchimoni releases “Pittari Shitai X'mas!”
- 21 Tanpopo releases “Oujisama to Yuki no Yoru”
- 28 Matsuura Aya releases “100kai no KISS”
- 29 Ishii Rika , Yasuda Kei , Rinne , Iida Kaori , Ayaka , Yaguchi Mari , Mika , Asami , Ishikawa Rika , Yoshizawa Hitomi , Gotou Maki , Matsuura Aya , Takahashi Ai , Konno Asami , Tsuji Nozomi , Ogawa Makoto , Kago Ai and Niigaki Risa release “The・Douyou Pops 1 Christmas to Fuyu no Uta Shuu”
- 29 Nakazawa Yuuko and Ichii Sayaka release “FOLK SONGS”
December 2001
- 5 Sheki-Dol releases “Ai wa Muteki〜Hatachi no Yoru no Chikai〜”
- 5 Minimoni｡ releases “Minihams no Ai no Uta”
- 12 Country Musume｡ releases “Country Musume｡ Daizenshuu ①”
- 17 Onoda Saori is born
- 19 Morning Musume｡ , Tanpopo , Country Musume｡ , Coconuts Musume｡ , Pucchimoni , Melon Kinenbi , Minimoni｡ , 10nin Matsuri , 7nin Matsuri and Sannin Matsuri release “Pucchi Best 2～San・7・10〜”