Morning Musume.'21 Ishida Ayumi & Sato Masaki FC Event ~Hiyoko ga 10nen Tattara, saa Nani ni Naru?~ "Maa Birthday Yattenai yo. Semete Ishou dake Kisasete!" "Iya, Title Nagai yo!"

Morning Musume.'21 Ishida Ayumi & Sato Masaki FC Event ~Hiyoko ga 10nen Tattara, saa Nani ni Naru?~ "Maa Birthday Yattenai yo. Semete Ishou dake Kisasete!" "Iya, Title Nagai yo!" Online – Ishida Ayumi & Sato Masaki's joint 2021 fanclub event to celebrate being over 10 years since they joined Morning Musume. as 10th generation members. Two shows took place at Edogawa cultural center on October 1, 2021.