2007 Happenings

people
- 4 0 new groups
- 5 4 disbanded groups
- 3 3 new leaders
- 3 3 ex-leaders
- 12 2 joined groups
- 15 12 left groups
- 13 9 graduations
- 0 0 born
- 4 2 retirements
- 3 -6 new idols
music
- 16 5 new albums
- 41 8 new singles

December 2007
- 19
  - Kusumi Koharu releases “Kirarin☆Land”
- 12
  - Melon Kinenbi releases “Melon Juice”
  - Hello! Project releases “Pucchi Best 8”
    featuring Maeda Yuki, Morning Musume｡, Melon Kinenbi, Berryz Koubou, v-u-den, ℃-ute, GAM, Morning Musume｡ Tanjou 10nen Kinentai, Kira☆Pika, Ongaku Gatas and Buono!
    
    H!P
- 11
  - Saho Akari joins Tomoiki・Ki wo Uetai
- 5
  - Ongaku Gatas releases “Yattarou ze!”
November 2007
- 30
  - Yutoku Ayumi leaves Hello! Project
    
    H!P
  - Yutoku Ayumi retires from show business
  - Yutoku Ayumi leaves Tomoiki・Ki wo Uetai
  - Yutoku Ayumi leaves HelloPro Kenshuusei
- 28
  - Berryz Koubou releases “Tsukiatteru no ni Kataomoi”
  - Kusumi Koharu releases “Chance!”
- 21
  - v-u-den releases “v-u-den Single Best 9 Vol.1 Omaketsuki”
  - Morning Musume｡ releases “Mikan”
- 14
  - Athena & Robikerotts is formed
    with
  - Athena & Robikerotts releases “Shouri no BIG WAVE!!!”
- 8
  - Ishii Rika releases “Fuyu no Ashioto”
- 7
  - The Possible releases “HAPPY Fifteen”
October 2007
- 31
  - Buono! releases “Honto no Jibun”
- 28
  - Gotou Maki leaves Hello! Project
    
    H!P
- 24
  - Morning Musume｡ releases “Morning Musume｡ ALL SINGLES COMPLETE 〜10th ANNIVERSARY〜”
  - Abe Natsumi releases “Iki wo Kasanemashou”
- 17
  - ℃-ute releases “Tokaikko Junjou”
- 13
  - Morozuka Kanami leaves Hello! Project
    
    H!P
  - Hashimoto Aina leaves Hello! Project
    
    H!P
  - Akiyama Yurika leaves Hello! Project
    
    H!P
  - Okada Robin Shouko leaves Hello! Project
    
    H!P
  - Gotou Yuki leaves Hello! Project
    
    H!P
  - Morozuka Kanami leaves HelloPro Kenshuusei
  - Oose Kaede leaves HelloPro Kenshuusei
  - Hashimoto Aina leaves HelloPro Kenshuusei
  - Akiyama Yurika leaves HelloPro Kenshuusei
  - Okada Robin Shouko leaves HelloPro Kenshuusei
  - Gotou Yuki leaves HelloPro Kenshuusei
- 10
  - Matsuura Aya releases “Double Rainbow”
  - Nakazawa Yuuko releases “Dannasama”
- 9
  - Ecomoni｡ disbands
    with Ishikawa Rika and Michishige Sayumi
September 2007
- 30
  - Morning Musume｡ Tanjou 10nen Kinentai disbands
    with Iida Kaori, Abe Natsumi, Gotou Maki, Niigaki Risa and Kusumi Koharu
- 26
  - v-u-den releases “Jajauma Paradise”
  - Maeda Yuki releases “Ai Ai Daiko”
- 12
  - Kira☆Pika releases “Kirarin☆Revolution Song Selection 2”
  - Ongaku Gatas releases “Narihajimeta Koi no BELL”
- 9
  - Gotou Maki releases “How to use SEXY”
- 5
  - Niigaki Risa joins Athena & Robikerotts
  - Niigaki Risa becomes leader of Athena & Robikerotts
  - Mitsui Aika joins Athena & Robikerotts
  - Nakajima Saki joins Athena & Robikerotts
  - Okai Chisato joins Athena & Robikerotts
  - Melon Kinenbi releases “Onegai Miwaku no Target〜Mango Pudding Mix〜”
- 1
  - Kira☆Pika disbands
    with Kusumi Koharu and Hagiwara Mai
August 2007
- 29
  - Matsuura Aya releases “Egao”
- 8
  - Morning Musume｡ Tanjou 10nen Kinentai releases “Itoshiki Tomo e”
  - Ishii Rika releases “Kagetsu Yoru”
- 7
  - Ogura Manami leaves Hello! Project
    
    H!P
  - Ogura Manami retires from show business
  - Ogura Manami leaves HelloPro Kenshuusei
- 1
  - Berryz Koubou releases “4th Ai no Nanchara Shisuu”
  - Kira☆Pika releases “Hana wo Puun / Futari wa NS”
  - The Possible releases “Kaze no Uwasa”
July 2007
- 25
  - Morning Musume｡ releases “Onna ni Sachi Are”
- 21
  - Buono! is formed
    with Tsugunaga Momoko, Natsuyaki Miyabi and Suzuki Airi
- 12
  - Ishii Rika releases “Kimi wo Sagashiteru”
- 11
  - ℃-ute releases “Meguru Koi no Kisetsu”
June 2007
- 27
  - Berryz Koubou releases “Kokuhaku no Funsui Hiroba”
- 19
  - Nakazawa Yuuko releases “SONGS&MONOLOGUES… Kisetsu no Monogatari ～Kikitai Koto～”
- 18
  - Ongaku Gatas is formed
    with Satoda Mai, Ishikawa Rika, Yoshizawa Hitomi, Korenaga Miki, Konno Asami, Noto Arisa, Mano Erina, Sengoku Minami, Sawada Yuri and Mutou Mika
- 16
  - GAM disbands
    with Fujimoto Miki and Matsuura Aya
- 13
  - The Possible releases “Natsu no Tropical Musume｡”
  - The Possible releases “Kingyo Sukui to Hanabi Takai”
- 10
  - Hashida Mirei leaves Hello! Project
    
    H!P
  - Hashida Mirei leaves HelloPro Kenshuusei
- 2
  - Takahashi Ai becomes leader of Morning Musume｡
- 1
  - Kira☆Pika is formed
    with Kusumi Koharu and Hagiwara Mai
  - Fujimoto Miki leaves Morning Musume｡
  - Fujimoto Miki steps down as leader of Morning Musume｡
May 2007
- 23
  - GAM releases “1st GAM〜Amai Yuuwaku〜”
  - v-u-den releases “Koisuru♡Angel♡Heart”
- 16
  - Tsuji Nozomi releases “Koko ni Iru zee!”
  - Tsuji Nozomi becomes a soloist
- 9
  - Abe Natsumi releases “Too far away ～Onna no Kokoro～”
- 7
  - Fujimoto Miki becomes leader of Morning Musume｡
- 6
  - Yoshizawa Hitomi steps down as leader of Morning Musume｡
  - Yoshizawa Hitomi leaves Morning Musume｡
- 2
  - Kusumi Koharu releases “Happy☆彡”
April 2007
- 25
  - Morning Musume｡ releases “Kanashimi Twilight”
- 18
  - ℃-ute releases “②mini〜Ikiru to Iu Chikara〜”
- 11
  - Gotou Maki releases “Secret”
- 4
  - RuRu releases “Shoshin”
March 2007
- 29
  - Mano Erina becomes a soloist
- 28
  - Melon Kinenbi releases “Unforgettable”
- 26
  - W disbands
    with Tsuji Nozomi and Kago Ai
  - Tsuji Nozomi leaves Hello! Project
    
    H!P
  - Kago Ai leaves Hello! Project
    
    H!P
- 24
  - GAM releases “Daisuki Rakuten Eagles”
- 21
  - Morning Musume｡ releases “SEXY 8 BEAT”
  - GAM releases “LU LU LU”
- 15
  - JunJun joins Hello! Project
    
    H!P
  - JunJun joins Morning Musume｡
  - LinLin joins Morning Musume｡
  - LinLin leaves HelloPro Kenshuusei
- 14
  - Abe Natsumi releases “25～Vingt-Cinq～”
  - The Possible releases “①Be Possible!”
- 7
  - Berryz Koubou releases “VERY BEAUTY”
February 2007
- 28
  - Kusumi Koharu releases “☆☆☆ (Mitsuboshi)”
- 21
  - ℃-ute releases “Sakura Chirari”
- 18
  - The Possible releases “Shushoku = GOHAN no Uta”
- 14
  - Morning Musume｡ releases “Egao YES Nude”
January 2007
- 28
  - Asami leaves Hello! Project
    
    H!P
  - Asami retires from show business
  - Miuna leaves Hello! Project
    
    H!P
  - Miuna retires from show business
  - Asami leaves Country Girls
  - Asami steps down as leader of Country Musume｡
  - Miuna leaves Country Girls
- 24
  - Morning Musume｡ Tanjou 10nen Kinentai releases “Bokura ga Ikiru MY ASIA”
- 10
  - Yutoku Ayumi joins Tomoiki・Ki wo Uetai
- 2
  - LinLin joins Hello! Project
    
    H!P
  - Kikkawa You joins Hello! Project
    
    H!P
  - LinLin joins HelloPro Kenshuusei
  - Kikkawa You joins HelloPro Kenshuusei