2005 Happenings

people
- 6 -1 new groups
- 6 2 disbanded groups
- 3 2 graduations
- 3 2 retirements
- 0 0 born
- 1 -32 new idols
- 2 -3 new leaders
- 2 -83 joined groups
- 2 -1 ex-leaders
- 51 22 left groups
music
- 27 -10 new singles
- 12 -4 new albums

December 2005
- 21
  - Iida Kaori releases “Plein d'Amour〜Ai ga Ippai〜”
  - Hello! Project releases “Pucchi Best 6”
    featuring Maeda Yuki, Morning Musume｡, Melon Kinenbi, W, Berryz Koubou, Ecomoni｡, v-u-den, Sexy Otonajan, Elegies, Puripuri Pink and DEF. DIVA
    
    H!P
  - Gotou Maki releases “Maki Goto 2005 Special Edition for Hawaii”
- 14
  - Gotou Maki releases “Gotou Maki Premium Best ①”
- 9
  - Heike Michiyo releases “unaffected”
- 7
  - Berryz Koubou releases “Special! Best Mini〜2.5 Maime no Kare〜”
November 2005
- 30
  - Abe Natsumi releases “Takaramono”
- 23
  - Berryz Koubou releases “Gag 100kai Bun Aishite Kudasai”
- 16
  - Berryz Koubou releases “Dai ② Seichouki”
- 9
  - Morning Musume｡ releases “Chokkan 2〜Nogashita Sakana wa Ookii zo!〜”
October 2005
- 26
  - v-u-den releases “Suite Room Number 1”
- 19
  - DEF. DIVA releases “Suki Sugite Baka Mitai”
- 5
  - v-u-den releases “Kurenai no Kisetsu”
- 2
  - Ishimura Maiha retires from show business
  - Ishimura Maiha leaves Hello! Project
    
    H!P
- 1
  - Tomoiki・Ki wo Uetai is formed
    with Noto Arisa, Oose Kaede, Furukawa Konatsu, Arihara Kanna and Maeda Yuuka
September 2005
- 30
  - Kawashima Miyuki leaves Hello! Project
    
    H!P
  - Kawashima Miyuki retires from show business
  - Kawashima Miyuki leaves HelloPro Kenshuusei
- 21
  - Matsuura Aya releases “Ki ga Tsukeba Anata”
- 7
  - W releases “Miss Love Tantei”
- 3
  - DEF. DIVA is formed
    with Abe Natsumi, Ishikawa Rika, Gotou Maki and Matsuura Aya
August 2005
- 31
  - Abe Natsumi releases “Koi no Hana”
- 10
  - v-u-den releases “Hitorijime”
- 3
  - Nochiura Natsumi disbands
    with Abe Natsumi, Gotou Maki and Matsuura Aya
  - Berryz Koubou releases “21ji Made no Cinderella”
July 2005
- 30
  - Ooyanagi Maho retires from show business
  - Ooyanagi Maho leaves Hello! Project
    
    H!P
  - Ooyanagi Maho leaves HelloPro Kenshuusei
- 27
  - Morning Musume｡ releases “Iroppoi Jirettai”
- 24
  - Puripuri Pink disbands
    with Nakazawa Yuuko, Inaba Atsuko, Yasuda Kei and Iida Kaori
  - Sexy Otonajan disbands
    with Fujimoto Miki, Murakami Megumi and Natsuyaki Miyabi
  - Elegies disbands
    with Shibata Ayumi, Satoda Mai, Takahashi Ai and Tanaka Reina
- 6
  - Gotou Maki releases “Suppin to Namida。”
June 2005
- 22
  - Puripuri Pink, Sexy Otonajan and Elegies release “Onna､ Kanashii､ Otona / Inshouha Renoir no You ni / Hitoshirezu Mune wo Kanaderu Yoru no Aki”
- 11
  - ℃-ute is formed
    with Umeda Erika, Yajima Maimi, Murakami Megumi, Nakajima Saki, Suzuki Airi, Okai Chisato and Hagiwara Mai
  - Hello! Project・Kids disbands
    with Umeda Erika, Yajima Maimi, Murakami Megumi, Nakajima Saki, Suzuki Airi, Okai Chisato and Hagiwara Mai
- 8
  - Berryz Koubou releases “Nanchuu Koi wo Yatteruu YOU KNOW?”
- 7
  - Puripuri Pink is formed
    with Nakazawa Yuuko, Inaba Atsuko, Yasuda Kei and Iida Kaori
  - Sexy Otonajan is formed
    with Fujimoto Miki, Murakami Megumi and Natsuyaki Miyabi
  - Elegies is formed
    with Shibata Ayumi, Satoda Mai, Takahashi Ai and Tanaka Reina
May 2005
- 25
  - v-u-den releases “Ajisai Ai Ai Monogatari”
- 18
  - W releases “Ai no Imi wo Oshiete!”
- 7
  - Kusumi Koharu joins Hello! Project
    
    H!P
  - Kusumi Koharu joins Morning Musume｡
  - Ishikawa Rika leaves Morning Musume｡
April 2005
- 27
  - Morning Musume｡ releases “Oosaka Koi no Uta”
- 20
  - Abe Natsumi releases “Yume Naraba”
- 15
  - Yoshizawa Hitomi becomes leader of Morning Musume｡
- 14
  - Yaguchi Mari leaves Morning Musume｡
  - Yaguchi Mari steps down as leader of Morning Musume｡
March 2005
- 30
  - Berryz Koubou releases “Special Generation”
- 24
  - Matsuura Aya releases “Matsuura Aya Best 1”
- 23
  - Mika releases “Mika”
- 17
  - Ishii Rika releases “Kotoshima”
- 2
  - W releases “2nd W”
  - v-u-den releases “Kacchoii ze! JAPAN”
February 2005
- 28
  - Heike Michiyo releases “Koimizuki”
- 23
  - Gotou Maki releases “3rd Station”
  - Matsuura Aya releases “Zutto Suki de Ii Desu ka”
- 9
  - Melon Kinenbi releases “Nikutai wa Shoujiki na EROS”
  - W releases “Koi no Fugue”
- 1
  - H.P. All Stars disbands
January 2005
- 31
  - Yaguchi Mari becomes leader of Morning Musume｡
  - Iida Kaori becomes a soloist
- 30
  - Iida Kaori steps down as leader of Morning Musume｡
  - Iida Kaori leaves Morning Musume｡
- 19
  - Morning Musume｡ releases “THE Manpower!!!”
- 9
  - Heike Michiyo releases “Ran・RUN・Ran”
- 1
  - Nakazawa Yuuko leaves H.P. All Stars
  - Iida Kaori leaves H.P. All Stars
  - Shimizu Saki leaves H.P. All Stars
  - Abe Natsumi leaves H.P. All Stars
  - Yasuda Kei leaves H.P. All Stars
  - Tsugunaga Momoko leaves H.P. All Stars
  - Yaguchi Mari leaves H.P. All Stars
  - Tokunaga Chinami leaves H.P. All Stars
  - Gotou Maki leaves H.P. All Stars
  - Sudou Maasa leaves H.P. All Stars
  - Natsuyaki Miyabi leaves H.P. All Stars
  - Inaba Atsuko leaves H.P. All Stars
  - Ishimura Maiha leaves H.P. All Stars
  - Kumai Yurina leaves H.P. All Stars
  - Ayaka leaves H.P. All Stars
  - Sugaya Risako leaves H.P. All Stars
  - Umeda Erika leaves H.P. All Stars
  - Yajima Maimi leaves H.P. All Stars
  - Saitou Hitomi leaves H.P. All Stars
  - Murakami Megumi leaves H.P. All Stars
  - Nakajima Saki leaves H.P. All Stars
  - Murata Megumi leaves H.P. All Stars
  - Suzuki Airi leaves H.P. All Stars
  - Ootani Masae leaves H.P. All Stars
  - Okai Chisato leaves H.P. All Stars
  - Shibata Ayumi leaves H.P. All Stars
  - Hagiwara Mai leaves H.P. All Stars
  - Ishikawa Rika leaves H.P. All Stars
  - Matsuura Aya leaves H.P. All Stars
  - Yoshizawa Hitomi leaves H.P. All Stars
  - Maeda Yuki leaves H.P. All Stars
  - Tsuji Nozomi leaves H.P. All Stars
  - Kago Ai leaves H.P. All Stars
  - Miyoshi Erika leaves H.P. All Stars
  - Okada Yui leaves H.P. All Stars
  - Kamei Eri leaves H.P. All Stars
  - Michishige Sayumi leaves H.P. All Stars
  - Tanaka Reina leaves H.P. All Stars
  - Asami leaves H.P. All Stars
  - Niigaki Risa leaves H.P. All Stars
  - Ogawa Makoto leaves H.P. All Stars
  - Konno Asami leaves H.P. All Stars
  - Takahashi Ai leaves H.P. All Stars
  - Miuna leaves H.P. All Stars
  - Satoda Mai leaves H.P. All Stars
  - Fujimoto Miki leaves H.P. All Stars