Morning Musume '20 Oda Sakura Birthday Event ~Sakura no Shirabe 9~ (モーニング娘。'20 小田さくらバースデーイベント ～さくらのしらべ9～) was Oda Sakura's 21st birthday event. It was originally set to take place on March 23, 2020 at Mielparque Hall, but was eventually rescheduled.
On March 11, 2020, it was announced that the event was cancelled in consideration of a new policy established by the government to prevent the spread of the coronavirus.
On June 30, 2020, it was announced that the event was rescheduled for July 28, 2020 at COTTON CLUB. In compliance with government policy, cheering, crowding, standing, and closeness in the venue were prohibited, and wearing masks was required to enter.