January 1, Morning Musume '18 became Morning Musume '19.

During the opening concert of the Hello! Project 20th Anniversary!! Hello! Project 2019 WINTER tour on January 2, the Morning Musume '19 LOVE Audition in search of 15th generation member(s) to join the group was announced.[124][125][126]

On March 20, they released the compilation album Best! Morning Musume 20th Anniversary.

On June 12, the group released their 67th single "Jinsei Blues / Seishun Night".

On June 22, the 15th generation were announced in a YouTube live stream on Morning Musume's official channel at 5:00 PM JST.[127] The winners of the Morning Musume '19 LOVE Audition were Okamura Homare and Kitagawa Rio, while a third member, Yamazaki Mei, was selected from Hello Pro Kenshuusei Hokkaido.[128][129] They were introduced on stage during the Hello! Project 2019SUMMER concert tour from July 13 and would begin performing with the group in the Morning Musume '19 Concert Tour Aki.[130]

Morning Musume '19 appeared on the TV Tokyo Ongakusai 2019 on June 26,[131][132] and they also appeared in TBS's Ongaku no Hi 2019 on July 13.[133][134]

On August 10, Morning Musume '19 performed at rockin'on presents ROCK IN JAPAN FESTIVAL 2019 on the GRASS STAGE.[135][136] With a capacity of over 60,000 people, this was their largest audience to date.[137][138]

On September 12, they performed in the NHK WORLD-JAPAN presents SONGS OF TOKYO Festival 2019.[139]

On October 13, they performed in the tv asahi DREAM FESTIVAL 2019.[140][141]

2020 Edit

On January 1, Morning Musume '19 became Morning Musume '20.

On January 22, they released their 68th single, "KOKORO&KARADA / LOVEpedia / Ningen Kankei No way