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佐藤優樹 (Sato Masaki) is a Japanese pop singer. She is a former idol under Hello! Project as a 10th generation member of Morning Musume., as well a former member of the SATOYAMA movement units Harvest, Jurin, and Sato no Akari. She graduated from both Morning Musume. and Hello! Project on December 13, 2021 due to health issues. As of April 2022, she is part of the M-line club.
Morning Musume. 2012 Autumn Tanjou 15 Shuunen Kinen ~Colorful Character~
Morning Musume. 10ki Member Event ~Iwai・Ashita de 1 Shuunen! 11ki Member ga Haittekuru Mae ni Watashitachi Ganbaranai to!!~
Morning Musume. 10ki Member Ohirome Event
Morning Musume. 9・10ki 1st Official Photobook
Alo-Hello! 7 ~Morning Musume.~
Alo-Hello! 6 ~Morning Musume.~
Alo-Hello! Morning Musume. Shashinshuu 2012
Alo-Hello! Morning Musume. 9・10ki
Morning Musume. ANNEX Event ~Iwai・Nyuugakushiki~
Dream Morning Musume. Special LIVE 2012 Nippon Budokan ~Dai Isshou Shuumaku "Yuusha Tachi, Shuugou Seyo"~
Alo-Hello! Morning Musume.'14 Shashinshuu
Mosuma. FC Event ~Gachi☆Kira~
Hello! Project 2015 COUNTDOWN PARTY 2015-2016 ~GOODBYE & HELLO!~
Hello! Project 2014 Hina Fes ~Full Course~ Main Dish wa Morning Musume.'14 Desu.
Hello! Project 2014 Summer ~KOREZO!~
Hello! Project 2014 Winter ~GOiSU MODE~
Hello! Project 2015 Hina Fes ~Mankai! The Girls' Festival~ ANGERME & Juice=Juice Premium
Hello! Project 2015 Winter ~DANCE MODE!~
Hello! Project 2015 Summer ~DISCOVERY~
Hello! Project 2016 Hina Fes ~Morning Musume.'16 Premium~
Nakai Masahiro no Black Variety
Mecha-Mecha Iketeru!
HEY!HEY!HEY! MUSIC CHAMP
Hello Pro! TIME
Women's Math Academy
MUSIC DRAGON
The Big Chance - Yume no Creator Audition
Agepoyo TV
Ahoyanen! Sukiyanen!
Shabekuri 007
Mujack
Ustream Musume
P-sma
Shitemiru Terebi! Kyoukun no Susume
Sakigake! Ongaku no Jikan
Tokugi☆Saikenshou Momusu.'17 DE Gozaru!
Morning Musume. 20th Anniversary Commemoration Special