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Sato Masaki
()(とう) 優樹(まさき)
Sato Masaki promoting "Furari Ginza"
Background Information
Also Known As Maa-chan (まーちゃん?)
Masaki (まさき?)
Born May 7, 1999 (1999-05-07) (age 19)
Origin Hokkaido, Japan
Blood Type A
Zodiac Sign Taurus Taurus
Height 157cm
Genres J-Pop
Occupation Idol, Singer, Actress, Model
Years Active 2011-present
(6 years)
Agency UP-FRONT AGENCY (2011-2012)
UP-FRONT PROMOTION (2012-present)
Label zetima
Associated Acts Morning Musume, Harvest, Jurin, Sato no Akari, Hello! Project Mobekimasu
Blog Morning Musume Tenkigumi Official Blog
Morning Musume Information
Joined September 29, 2011
Generation 10th Generation
Member Color       Emerald Green
Debut Single Pyocopyoco Ultra
Time in Group 6 Years, 11 Months, 23 Days
Sato's Autograph
I think I’m not good at reading the situation. I don’t like reading to begin with anyway... but is an Idol who’s good at those things really that interesting?

–Sato Masaki, August 2013

Sato Masaki (佐藤優樹) is a Japanese pop singer 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.



Sato Masaki, June 2018


Sato Masaki, December 2017


Sato Masaki, October 2017


Sato Masaki, June 2017


Sato Masaki, November 2016


Sato Masaki, May 2016

SatoTsumetai 1

Sato Masaki, December 2015


Sato Masaki, August 2015


Sato Masaki, April 2015


Sato Masaki, December 2014


Sato Masaki, October 2014

Satou 56 sora

Sato Masaki, April 2014


Sato Masaki, January 2014


Sato Masaki, September 2013


Sato Masaki, August 2013


Sato Masaki, April 2013


Sato Masaki, January 2013


Sato Masaki, October 2012

Satou 01 img

Sato Masaki, September 2012


Sato Masaki, July 2012


Sato Masaki, April 2012


Sato Masaki, December 2011

Tenth 7

Sato Masaki, September 2011

Early LifeEdit

Sato Masaki was born on May 7, 1999 in Hokkaido, Japan.


On September 29, Sato was selected from Morning Musume's 10th generation audition to join the group along with Iikubo Haruna, Ishida Ayumi, and former Hello Pro Kenshuusei member Kudo Haruka.[1] The tenth generation made their official presentation on the same day they were announced as new members at the Morning Musume Concert Tour 2011 Aki Ai BELIEVE ~Takahashi Ai Sotsugyou Kinen Special~ concert, and they participated in a performance of the songs "Tomo" and "Namidacchi".


On January 13, the Morning Musume 9th generation and 10th generation members began a web talk show exclusive to fanclub members, titled Morning Musume 9ki・10ki Member WEB Talk Maji DE Pyokopyoko!.[2] They also began a radio show on April 7, titled Morning Musume no Morning Jogakuin ~Houkago Meeting~, on Radio Nippon.[3]

On April 18, it was announced that Morning Musume's Tanaka Reina and the 9th and 10th generation members would participate in a new musical titled Stacies Shoujo Saisatsu Kageki. The musical ran from June 6 to June 12.

On May 13, information was released about an event featuring Morning Musume's 9th and 10th generations and S/mileage's 2nd generation, titled Mosuma FC Event ~Gachi☆Kira~. It took place throughout June and the beginning of July at Yokohama Blitz.

On October 10, it was announced that Sato would be a member of the new SATOYAMA movement unit Harvest alongside Ikuta Erina, Ishida Ayumi, and Takeuchi Akari.


On May 7, Sato celebrated her 14th birthday at a fanclub event titled Sato Masaki Birthday Event ~14sai Nau Nauuuu!!~, which featured two shows at TOKYO FM HALL and had Kudo Haruka as a guest.

On May 16, the Morning Musume 9th generation and 10th generation members' fanclub-exclusive web talk show Morning Musume 9ki・10ki Member WEB Talk Maji DE Pyokopyoko! ended with a total of 70 episodes.[4]

On July 23, it was announced that Sato would be a member of the new SATOYAMA movement unit Jurin with Juice=Juice member Miyamoto Karin.


On March 13, it was announced that Sato would be a member of a newly formed SATOYAMA movement unit with Katsuta Rina and Uemura Akari called Sato no Akari.

On May 7, Sato celebrated her 15th birthday at a fanclub event titled Morning Musume '14 ~Sato Masaki Birthday Event 2014~, which featured two shows at TOKYO FM HALL.


On May 7, Sato celebrated her 16th birthday at a fanclub event titled Morning Musume '15 Sato Masaki Birthday Event, which featured two shows at TOKYO FM HALL.


On May 20, Sato celebrated her 17th birthday at a fanclub event titled Morning Musume '16 Sato Masaki Birthday Event at Yamano Hall.

On December 22, it was announced that Sato had injured her back and was diagnosed with acute lower back pain from a lumbar herniated disc. As a result, she missed the Morning Musume '16 x ANGERME FC Event "Gachi☆Kira Christmas Sen" on December 24, as well as the cheki and handshake events on December 25.[5]

On December 28, it was announced that Sato would be missing the Hello! Project COUNTDOWN PARTY 2016 ~GOOD BYE & HELLO!~ concert, as well as the January 2 to January 4 shows of the Hello! Project 2017 WINTER tour due to her back injury. She would have an appointment with her doctor on January 4 to determine whether she was fit to perform again or not.[6]


On January 6, it was announced that Sato would take a break from activities until late February.[7][8] Sato had a re-examination of her lumbar disc herniation two days before, which the doctor concluded she was still not in the condition to resume performing on stage. At this time, the UP-FRONT PROMOTION representative and Sato herself revealed that she was diagnosed with a suspected lumbar disc herniation back in June 2015, but she did not have enough time for physical training. Sato did physical training throughout January as the doctor monitored the progress of her condition. In mid-February they would judge whether she could restart activities in March.

Due to being in recovery during the production period, Sato was not featured in the A-sides of Morning Musume '17's 63rd single, "BRAND NEW MORNING / Jealousy Jealousy", released on March 8.[9] Despite this, she was featured in Limited Edition SP's exclusive B-sides.

On February 24, it was announced that Sato would return from hiatus on March 18, on the opening day of Morning Musume '17's spring concert tour.[10][11]

Sato celebrated her 18th birthday at a fanclub event, titled Morning Musume '17 Sato Masaki Birthday Event, on May 8 at Differ Ariake.

On May 19, Sato released a digital song with Kudo Haruka titled "Miss Henkan!!".

On November 8 and 9, the 10th generation members of Morning Musume '17 held the Morning Days Happy Holiday 10ki Member Iikubo Haruna・Ishida Ayumi・Sato Masaki・Kudo Haruka Fanclub Tour in Yamanashi.


On March 17, Sato was featured in the graduation2018 Koukou Sotsugyou published by TOKYO NEWS magazine&mook, commemorating her and other idols' graduation from high school in 2018.[12]

On May 7, she celebrated her 19th birthday at a fanclub event titled Morning Musume '18 Sato Masaki Birthday Event, which took place at Differ Ariake.

On October 6, Sato will release her first visual photobook, titled Sankaku no Glass.[13]

Personal LifeEdit

She has two younger sisters, and her mother is a huge fan of Morning Musume.

On January 11, 2013, it was released that Sato Masaki, who has been resting since December 31st due to a high fever, has been diagnosed with left neck cervical lymphadenitis after a detailed examination. She was absent for all events between December 31 through January 17.

When she auditioned for Morning Musume, Sato was a 6th grade elementary school student. She started high school in April 2015 and graduated in March 2018.

Sato most notably gets along with Tanaka Reina, Kudo Haruka, and Oda Sakura.

Her pairing name with Kudo is MaaDuu (まぁーどぅー),
and her pairing name with Oda is MaaSaku (まぁーさく).

Sato's given name, Masaki, means "kind" (優; masa) combined with "trees" (樹; ki). Sato believes her parents chose this name for her to be a kind child.[14]

Here is a list of nicknames that have been used to refer to Sato Masaki:

  • Maa-chan (まーちゃん): Official nickname, given her since joining Morning Musume.[15] Used by members and fans.
  • Masaki (まさき): Second official nickname, given her since joining Morning Musume. Used by members and fans.



See also: List:Sato Masaki Discography Featured In

Solo DVDsEdit


Solo Fanclub DVDsEdit


Solo SongsEdit

  • [2016] Ou no Tsutome (from Zoku 11nin Iru! Higashi no Chihei, Nishi no Towa)


See also: List:Sato Masaki Publications Featured In

Solo PhotobooksEdit


Digital PhotobooksEdit


TV ProgramsEdit

TV DramasEdit

New drama




  • [2011] Michishige Sayumi no "Mobekimasutte Nani??" (道重さゆみの『モベキマスってなに??』)
  • [2012] Guest, Maachan (ゲスト、まぁちゃん。)
  • [2013–] Hello! Project Station (ハロ!ステ)


  • [2012–2013] Morning Musume 9ki・10ki Member WEB Talk Maji DE Pyoko! (モーニング娘。9・10期メンバー WEBトーク 本気DE飛跳!) (fanclub exclusive)
  • [2012–] Morning Musume no Morning Jogakuin ~Houkago Meeting~ (モーニング娘。のモーニング女学院~放課後ミーティング~)


  • She was voted 6th favorite member in the 2012 "Hello! Project Music Awards" event.[16]
  • She was voted 5th favorite member in the 2013 "Hello! Project Music Awards" event.[17]
  • In Radio bangumi magazine's 7th edition "favorite DJ ranking", readers voted for her as the #1 ranked DJ on AM radio in 2014.[18]
  • She was voted most charming member of Morning Musume by Korean fans at a quiz event in Korea in 2016.[19]


  • She is known for having a cheerful, goofy character.
  • Both Tsunku and Oda Sakura stated in separate interviews that she is a genius.
  • She is the only 10th generation member that has not had past experience in the entertainment industry.
  • She spoke English until she was five years old because she grew up watching Disney Channel shows (and still watches them despite no longer understanding English). When she began kindergarten she had to start using Japanese.
  • Takagi Sayuki has said that she heard that Sato can see fairies.
  • She blew a kiss during her second time on stage and called it a "MasaKiss".[20]
  • Sato, Fukumura Mizuki and Nonaka Miki are the only three Morning Musume members to be left handed.
  • Her rivals are Ishida Ayumi and Oda Sakura.
  • She and Suzuki Kanon are known for having perfect pitches when it comes to recognizing notes played on the piano.[21]
  • She usually forgets and stumbles on speaking lines on stage.
  • She is known to be affectionate with fellow members, particularly sharing hugs with Tanaka Reina and Michishige Sayumi.
  • She said on a radio show that she'd like to go and see all of America.
  • She is afraid of chicks, which bears resemblance to Ishikawa Rika who is an ornithophobe.[22]
  • In elementary school, she was called Maasa a lot because of her name Masaki, and her resemblance to Sudo Maasa from Berryz Koubou.
  • She has played the piano since she was two and has said that if she were not a member of Morning Musume, she would want to be a piano teacher.
  • Practiced drums starting in her third year of elementary school, but stopped in 2010.
  • She is practiced to competition level obstacle jumping in horse back riding.
  • She began ballet in second grade to help her fix her posture. However, by the time she became a Morning Musume member, she had already quit.
  • She had said that she wouldn't allow any 12th generation member to get the light blue member color.[verification needed]
  • During Morning Musume no Morning Jogakuin ~Houkago Meeting~, Sato talked admiringly about ANGERME member Sasaki Rikako.
  • Michishige Sayumi said that one of her dreams is for her sister Aneshige and Sato to meet up.
  • Kudo Haruka said that Sato can communicate with aliens, while Oda Sakura finds Sato's disappearances a mystery,[23] and believes that there is no person who could beat Sato in communication skills. Oda once said in an old interview that Sato could be the next evolution of the human race.[24]
  • Their manager asked her to make something with someone (from the management) for the 12th generation to practice their sense of rhythm. But before they could, she’d already made it all by herself: a CD of her own composition.[25][26]
  • Tsunku commented: "She keeps acting the youngest one, but she's quite clever. She's bad at studying, but somehow she has the ability to pull through, making her a smart girl in one way. But if she sees this she'll just think she's smart, and that's kinda scary... Work hard!"[27]
  • 3 of 4 members in the 12th generation had said that Sato was a genius, first by Nonaka Miki in her blog, then Makino Maria in her blog. [28]
    • Nonaka: She was talking about "bringing everyone together", and she's been helping 12th gen. with dancing, and has been teaching me a lot. Up to the really small details of the dance. So, Since I really love Sato-san's dancing, I want to become like that too! I really love Sato-san's dancing. It's my goal. And, I also think Sato-san's words are amazing, to the point that one day I'd like her to write some sort of poem collection, and make it into a book. If Sato-san were to release a book, I'd definitely buy many copies (laugh).
    • Makino: Though I always think it, Sato-san is such a genius. What she says, what she thinks, all the questions she has... She's not a normal person, or rather, her way of looking at things is different from everyone else's.
    • Ogata Haruna: Sato-san is a genius. Like the metaphors she uses to talk... I think that sort of thing is amazing. It's like she's not human. Someone who can do anything.
  • Oda Sakura as well said in the radio show Morning Jogakuin that she would like to learn the genius of Sato. She also said that Sato composes music at home like it's her side job. [24] She even does some recording in the car.
  • She uses an iPad application to create songs using drums, piano, and guitar. She added Oda Sakura's voice to a song and made her own version of "Fantasy ga Hajimaru" (Masaki Version) featuring Oda.[28] Sato also does programmed drum beats, EDM, vocal things, key modulations.[29]
  • She had created her own song titled "Jinsei wa Iroiro Aru♪" (人生はいろいろあーる♪). When she heard that Fukumura Mizuki had become leader, she imagined Fukumura-san's face and earnestly wrote a song about her. But when it was finished, she felt embarrassed and didn't show the completed song to her. Only Oda has heard the full song.[28]
  • During handshake events she has been known to spray perfume on fans. After one event, the occurrence trended on Twitter.[30]
  • She was called "the monster overflowing with talents," in the headline of a April 2015 interview with LoGirl.[25]
  • She can imitate the singing voices of some aces and Hello! Project's best vocalists, such as Tanaka Reina, Fujimoto Miki, Sugaya Risako, and Sayashi Riho. Fans sometimes find it hard to distinguish her powerful vocals from Oda Sakura's vocals.
  • Miyamoto Karin said on the au headline web show Idol Mou Icchou that Sato always says "I can't do it", but when things begin, she suddenly changes like someone else and works it out. Miyamoto thinks of herself as a hard worker who can achieve only by practice, while Sato is gifted by nature. Miyamoto declared: "I want to beat her gifted talent with my effort." The host (known as Gurasu-san, a fan of Sato as well) says Sato is in some respects a tensai (genius), which Miyamoto agreed with.[31]
  • Lyricist and musical teacher Niira Etsuko told the behind-the-scenes story about the song "Princess Margaret" from LILIUM -Lilium Shoujo Junketsu Kageki- in a YouTube video.[32] According to her, the arrangement of the song was mostly done by Sato. The original demo was only 1:15~1:25, which Sato changed to 1:26~1:35. Niira said Sato is genius and you can't easily find someone like her in Japan. Sato was scolded for adding too much to the arrangement, but Niira says it's her fault because she's the one who approved it. Lastly, she said that changing other's work to the extent that you are scolded for it is amazing and that Sato hit the nail on the head musically. "From the point of view of normal Japanese woman or their peace-at-any-price principle, Maa-chan is the one who causes trouble... I can see why she likes Reina," she said with a laugh.
  • HKT48 member Sashihara Rino is a big fan of hers.[33] Ito Chiyuri from Team Syachihoko, Sasaki Ayaka from Momoiro Clover Z,[34] and LingLing from BiSH are confessed fans of Sato as well[35]
  • Oda Sakura and Iikubo Haruna said that Sato mistook the lyrics in "Utakata Saturday Night!". Sato often sung the line is "ato mawashite" (後回して; put it off later) as "atama mawashite" (頭回して; turn your head), but has since begun to sing it normally.[36] You can see her lipsync it like this in her solo version.
    • Oda also said that Nonaka Miki's younger sister noticed this while watching the MV and asked Nonaka: "This part... did Sato-san sang 'atama mawashite', onee-chan?" Then they asked Sato directly and she said she really thought it was "atama mawashite".
  • If she could be reborn as someone else, she would be Tsuji Nozomi. When they first met, the mama Tsuji was different from the Tsuji she saw on TV, and Sato would like to become a mother like her.[15]
  • She believes she is the most selfish Hello! Project member.[15]
  • In 20 years after 2017, Sato wants to be working beside Tsunku. She wants to teach songs to Morning Musume members, decide their concert stages and setlists, and become a producer.[15]
  • If she didn't become an idol, she would like to have become a doctor. She believes she wouldn't make a mistake if she had to operate on a family member.[15]
  • She revealed on Youngtown that a fortune teller told her that she should graduate this year or in the next five years. But as she began to think about graduating, Ogata Haruna announced her graduation.[verification needed]

See AlsoEdit


  1. 1.0 1.1 "モーニング娘。10期メンバー 決定!" (in Japanese). Hello! Project Official Website. 2011-09-30.
  4. "モーニング娘。9期10期メンバー Webトーク「本気DE飛跳!」(Vol.70)」本日21時より配信♪" (in Japanese). UP-FC. 2013-05-16.
  5. "モーニング娘。'16 佐藤優樹についてのお知らせ" (in Japanese). Hello! Project. 2016-12-22.
  6. "​モーニング娘。'16 佐藤優樹についてのお知らせ" (in Japanese). Hello! Project. 2016-12-28.
  7. "モーニング娘。'17 佐藤優樹 ステージ活動休止のお知らせ" (in Japanese). Hello! Project. 2017-01-07.
  8. "[EN] Concerning Masaki Sato of Morning Musume。'17." UP-FRONT LINK. 2017-01-11.
  9. "モーニング娘。'17 NEWシングルリリースのお知らせ" (in Japanese). Hello! Project. 2017-01-26.
  10. "モーニング娘。'17 佐藤優樹 ステージ活動再開のお知らせ" (in Japanese). Hello! Project. 2017-02-24.
  11. "[EN] Concerning the medical condition of Masaki Sato." UP-FRONT LINK. 2017-02-24.
  12. "graduation2018 高校卒業" (in Japanese). TOKYO NEWS magazine&mook. 2018-03-17.
  13. "佐藤優樹(モーニング娘。'18)ファーストビジュアルフォトブック「三角の硝子」発売決定!!" (in Japanese). Hello! Project. 2016-08-27.
  14. Pocket Morning. 2016-11-01. (Translation by Ro-kun)
  15. 15.0 15.1 15.2 15.3 15.4 15.5 15.6 15.7 15.8 "モーニング娘。'17佐藤優樹が“20問20答”でハロプロ愛を語る!【ハロプロ誕生20周年記念連載】" (in Japanese). The Television. 2017-10-24.
  20. ハロプロ!TIME #25
  21. 佐藤優樹(モーニング娘。)プロフィールムービー (in Japanese)
  22. Morning Musume DVD Magazine Vol.53. 2013-09-21.
  23. Pocket Morning Mobile App. 2014-01-09. (Translation)
  24. 24.0 24.1
  25. 25.0 25.1
  26. "「無自覚な怪物」佐藤優樹 ライブ撮りおろし&ソロインタビュー" (in Japanese). LoGirl. 2015-04-15.
  27. "モーニング娘。'14 10/15発売シングル「TIKI BUN/シャバダバ ドゥ~/見返り美人」" (in Japanese). Tsunku Official Blog. 2014-08-28
  28. 28.0 28.1 28.2 "モーニング娘。'15『青春小僧が泣いている/夕暮れは雨上がり/イマココカラ』インタビュー" (in Japanese). Billboard Japan. 2015.
  33. "HKT指原莉乃、“推しメン”モー娘。佐藤優樹との共演「職権乱用」" (in Japanese). ORICON STYLE. 2016-12-14.
  36. Morning Musume no Morning Jogakuin ~Houkago Meeting~. Radio Nippon. 2016-08-06.

External LinksEdit