Morning Musume Kessei 20 Shuunen Kinen Event ~21 Nenme mo Ganbatte Ikimasshoi!~ (モーニング娘。結成20周年記念イベント ～21年目もがんばっていきまっしょい！～; Morning Musume 20th Anniversary Commemoration Event ~Let's Also Do Our Best in the 21st Year!~) was Morning Musume '17's 20th anniversary event. It took place on September 14, 2017 at Shinkiba STUDIO COAST.
A recording of the event was released in the limited edition Blu-ray of the album ⑮ Thank you, too.
- Morning Coffee
- 7th Place Request: KoiING
- 6th Place Request: I WISH (Updated)
- 5th Place Request: Shabondama
- 4th Place Request: Resonant Blue
- 3rd Place Unit Request: Daisuki Dakara Zettai ni Yurusanai - Oda Sakura, Nonaka Miki
- 2nd Place Unit Request: Robo Kiss - Sato Masaki, Kudo Haruka
- 3rd Place Request: One・Two・Three (Updated)
- 2nd Place Request: Fantasy ga Hajimaru
- 1st Place Request: Say Yeah! ~Motto Miracle Night~
- 1st Place Unit Request: Ookii Hitomi - Michishige Sayumi, Tanaka Reina
- Kare to Issho ni Omise ga Shitai! - Morning Musume '17, Michishige Sayumi, Tanaka Reina
- Jama Shinai de Here We Go!
- Wagamama Ki no Mama Ai no Joke
- What is LOVE?
- Roman ~MY DEAR BOY~
- LOVE Machine (Updated)
- 9th Gen: Fukumura Mizuki, Ikuta Erina
- 10th Gen: Iikubo Haruna, Ishida Ayumi, Sato Masaki, Kudo Haruka
- 11th Gen: Oda Sakura
- 12th Gen: Ogata Haruna, Nonaka Miki, Makino Maria, Haga Akane
- 13th Gen: Kaga Kaede, Yokoyama Reina
- 14th Gen: Morito Chisaki
|Date||Venue||Prefecture||Doors Open||Concert Starts|
|9/14||Shinkiba STUDIO COAST||Tokyo||17:30||18:30|
- A voting form was open from July 31 to August 14, 2017 in order to decide what songs the group would perform at the event. Fans could only vote for one song (including songs by Morning Musume sub-units and soloists), comment on their selection, and request which Morning Musume '17 members they want to see perform that song.
- Shinkiba STUDIO COAST is the same location used for the "Sukatto My Heart" music video, as well as ℃-ute's "Naze Hito wa Arasoun Darou?" music video.
- In the fourth MC, it was revealed that "Daite HOLD ON ME!" was voted 10th, "Be Alive" was 9th, and "Pyocopyoco Ultra" was 8th.