List Diffrent formations successives of Morning Musume Members
- 1st formation
September 1997 :1st Generation
- Singles:Ai no Tane, Morning Coffee
- 2nd formation
May 1998 :2nd Generation: Yasuda Kei ,Yaguchi Mari ,Ichii Sayaka.
- Singles:Summer Night Town,Daite HOLD ON ME!,Memory Seishun no Hikari
- Albums:First Time
- 3rd formation
April 1999 :Departures of Fukuda Asuka.
- Singles:Manatsu no Kousen,Furusato
- Album:Second Morning
- 4th formation
August 1999 :3rd Generation Joned Goto Maki.
- Singles:LOVE Machine
- 5th formation
January 2000 :Departures of Ishiguro Aya
- Singles:Koi no Dance Site
- Albums:3rd -LOVE Paradise-
- 6th formation
April 2000 :4th Generation Joned
- Singles:Happy Summer Wedding
- 7th formation
May 2000:Departures of Ichii Sayaka.
- Singles:I WISH,Ren'ai Revolution 21
- 8th formation
April 2001 :Departures of Nakazawa Yuko.
- Singles:The Peace!
- 9th formation
August 2001 :5th Generation Joned
- 10th formation
September 2002 :Departures of Goto Maki.
- Singles:Koko ni Iruzee!,Morning Musume no Hyokkori Hyoutanjima,AS FOR ONE DAY
- Albums: No.5
- 11th formation
May 2003 :Departues of Yasuda Kei. January/May 2003 :6th Generation Joned
- 12th formation
January 2004 : Departures of Abe Natsumi.
- 13th formation
August 2004 : Departures of Tsuji Nozomi & Kago Ai
- Singles:Namida ga Tomaranai Houkago,THE Manpower!!!
- Albums:Ai no Dai 6kan
- 14th formation
Janaury 2005 :Departures of Iida Kaori.
- Singles:Osaka Koi no Uta
- 15th formation
April 2005 :Yaguchi Mari's left.
- 16th formation
May 2005 : Departures of Ishikawa Rika.
- 17th formation
mid-May 2005 :7th Generation joned Kusumi Koharu.
- Singles:Iroppoi Jirettai,Chokkan 2 ~Nogashita Sakana wa Ookiizo!~, SEXY BOY ~Soyokaze ni Yorisotte~, Ambitious! Yashinteki de Ii jan
- Albums:Rainbow 7
- 18th formation
July 2006 : Departures of Konno Asami.
- 19th formation
August 2006 : Departures of Ogawa Makoto.
- Singles:Aruiteru
- Mini-albums:7.5 Fuyu Fuyu Morning Musume Mini!
- 20th formation
December 2006 :8th Generation (1) : Mitsui Aika
- Singles:Egao YES Nude,Kanashimi Twilight
- Albums:SEXY 8 BEAT
- 21th formation
May 2007 : Departure of Yoshizawa Hitomi May 2007 : 8th Generation (2) : Junjun & Linlin
- 22th formation
June 2007 :Fujimoto Miki's left
- Singles : Onna ni Sachi Are,Mikan,Resonant Blue,Pepper Keibu,Naichau Kamo,Shouganai Yume Oibito,Nanchatte Ren'ai,Kimagure Princess
- Albumss: COVER YOU,Platinum 9 DISC
- 23th formation
December 2009 : Departures of Kusumi Koharu
- Singles:Onna ga Medatte Naze Ikenai,Seishun Collection,Appare Kaitenzushi! (Muten Musume),Onna to Otoko no Lullaby Game
- Albums:10 MY ME,Fantasy! Juuichi
- 24th formation
December 2010 : Departures of Kamei Eri,Junjun & Linlin
- 25th formation
January 2011 : 9th Generation Joned
- Singles :Maji Desu ka Ska!,Only You,Kono Chikyuu no Heiwa wo Honki de Negatterun da yo!
- Albums:12, Smart
- 26th formation
September 2011 : Departures of Takahashi Ai
- 27th formation
October 2011 : 10th Generation Joned
- Singles:Pyocopyoco Ultra,Ren'ai Hunter
- 28th formation
May 2012 : Departures of Niigaki Risa & Mitsui Aika
- 29th formation
September 2012 : 11th Generation Joned Oda Sakura
- 30th formation
May 2013 : Departures of Tanaka Reina
- Singles:Wagamama Ki no Mama Ai no Joke / Ai no Gundan,Egao no Kimi wa Taiyou sa / Kimi no Kawari wa Iyashinai / What is LOVE?,Toki wo Koe Sora wo Koe / Password is 0,TIKI BUN / Shabadaba Doo~ / Mikaeri Bijin
- Albums:The Best! ~Updated Morning Musume~,Morning Musume '14 Coupling Collection 2,14shou ~The message~
- 31th formation
November 2014 : Departures of Michishige Sayumi
- 32th formation
January 2015 : 12th Generation Joned
- Singles:Seishun Kozou ga Naiteiru / Yuugure wa Ameagari / Ima Koko Kara,Oh my wish! / Sukatto My Heart / Imasugu Tobikomu Yuuki, Tsumetai Kaze to Kataomoi / ENDLESS SKY / One and Only
- 33th formation
December 2015 : Departures of Sayashi Riho
- 34th formation
May 2016 : Departures of Suzuki Kanon
- 35th formation
December 2016: 13th Generation Joned
- 36th formation
June 2017: 14th Generation Morito Chisaki Joned
- Singles:Jama Shinai de Here We Go! / Dokyuu no Go Sign / Wakain da shi!, Gosenfu no Tasuki
- Albums:⑮ Thank you, too
- 37th formation
December 2017: Departures of Kudo Haruka
- 38th formation
June 2018: Departures of Ogata Haruna
- 39th formation
December 2018: Departures of Iikubo Haruna
- 40th formation
August 2019: 15th Generation Joned
- Singles:KOKORO&KARADA / LOVEpedia / Ningen Kankei No way way, Junjou Evidence / Gyuu Saretai Dake na no ni,Teenage Solution / Yoshi Yoshi Shite Hoshii no / Beat no Wakusei
- Albums:16th ~That's J-POP~
- 41st formation
December 2021: Departures of Sato Masaki
- 42nd formation
June 2022: Departures of Morito Chisaki
- 43rd formation
June 2022: 16th Generation Joned Sakurai Rio
- 44th formation
December 2022 Departures of Kaga Kaede
- 45th formation
June 2023: 17th Generation joned Inoue Haruka & Yumigeta Ako
