Sato Masaki (佐藤優樹) 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 the group and Hello! Project on December 13, 2021, in order to become a soloist.
- 1 Biography
- 2 Personal Life
- 3 Profile
- 4 Discography
- 5 Publications
- 6 Works
- 7 Rankings
- 8 Trivia
- 9 See Also
- 10 References
- 11 External Links
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 Egg member Kudo Haruka. The 10th 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 Pyoko!. They also began a radio show on April 7, titled Morning Musume no Morning Jogakuin ~Houkago Meeting~, on Radio Nippon.
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 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.
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×ANGERME FC Event "Gachi☆Kira Christmas Sen" on December 24, as well as the cheki and handshake events on December 25.
On December 28, it was announced that Sato would continue to miss 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.
On January 6, it was announced that Sato would take a break from activities until late February. 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. Despite this, she was featured in Limited Edition SP's exclusive B-sides.
Sato celebrated her 18th birthday at a fanclub event, titled Morning Musume '17 Sato Masaki Birthday Event, on May 8 at Differ Ariake.
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.
On May 7, she celebrated her 19th birthday at a fanclub event titled Morning Musume '18 Sato Masaki Birthday Event at Differ Ariake.
On March 8, it was announced that Sato would voice the recurring character Mei, the baby sister of the main character, in the NHK E Tele anime Aware! Meisaku-kun which began its fourth season on April 5.
On May 7, she celebrated her 20th birthday at a fanclub event titled Morning Musume '19 Sato Masaki Birthday Event with two shows at Shinagawa Stellar Ball.
On May 7, she was set to celebrate her 21st birthday at a fanclub event titled Morning Musume '20 Sato Masaki Birthday Event with two shows at Zepp Tokyo. It was later cancelled due to the government's declaration of emergency following the spread of the coronavirus getting worse. The event was eventually rescheduled for August 26.
On February 21, Sato Masaki was absent from a release event due to poor health and severe abdominal pain. It was later announced that she had been diagnosed with irritable bowel syndrome by a doctor. She had also taken a blood test that same day, and she was subsequently absent from activities until the results came out. On March 12, it was announced that she would need two weeks of treatment for her irritable bowel syndrome, and she would be absent from the March 13 Hello! Project 2021 Haru "Kachou Fuugetsu" concert as a result. On March 23, it was announced that Sato would remain on rest from all activities until the end of April as the symptoms of her irritable bowel syndrome have not changed. As a result, she would be absent from the Hello! Project Hina Fes 2021, from the April 4 to 29 concerts of the Hello! Project 2021 Haru "Kachou Fuugetsu" tour, from the 16th ~That's J-POP~ release commemoration event on March 25 and 30, and from the "Junjou Evidence / Gyuu Saretai Dake na no ni" release event on April 3. After consulting with a doctor, it was announced that she would be absent for concerts through May 30 so she can continue treatment and refrain from strenuous activities.
On June 3, an update on Hello! Project's website announced that Sato would also be missing the Hello! Project 2021 Summer Sapphire & Ruby tour, scheduled to start in July, as it was still difficult for her to do work that involves long-term travelling and activities in an environment where she have to stay in the same place for a long time. She would be gradually resuming other activities by watching her situation from time to time. On July 5, another update on Hello! Project's website announced that she would also be absent from the Hello! Project 2021 Aki "Zoku Kachou Fuugetsu" tour.
On September 24, it was announced that Sato will be graduating from Morning Musume and Hello! Project on December 13 in order to begin activities as a solo artist. Since February, Sato has been suffering from irritable bowel syndrome, which made her absent from several activities, mainly concerts and events. Her condition has been improving, but it is still interfering with her activities, and she expressed that it is difficult for her to continue activities as a Morning Musume member. As a result of several discussions, she decided to improve her health condition first rather than continue in the group under this situation where she can't make plans for the future. She also had a strong desire of graduating at a Morning Musume concert, and although she is still concerned about her health, she decided that the upcoming concert at Nippon Budokan, which was already planned to happen, will be her graduation concert. Sato has also expressed desire to continue her music activities as a solo artist after graduating, so she is planning to distribute singing videos while monitoring her health.
On October 1, she and Ishida Ayumi held a joint fanclub event titled Morning Musume '21 Ishida Ayumi & Sato Masaki FC Event ～Hiyoko ga 10-nen tattara, saa nani ni naru? ~“Mabasude yattenai yo. Semete isho dake ki sasete!” “Iya, taitoru nagai yo!”, featuring two shows at Edogawa cultural center.
On December 15, she opened an official Ameba Blog. 
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.On June 25, 2019, Sato wrote a blog post revealing that she had been attending university since April after candid photos of her walking down a street with another person were taken without permission and posted on Twitter. She explained that she was walking to the station ticket gate with her senior after class had ended and apologized if anyone had thought of something bad because of it. She also wrote that she would do her best at both work and studying.
Her pairing name with Kudo is MaaDuu (まぁーどぅー),
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.
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. Used by members and fans.
- Masaki (まさき): Second official nickname, given her since joining Morning Musume. Used by members and fans.
- Name: Sato Masaki (佐藤優樹)
- Nicknames: Maa-chan (まーちゃん), Masaki (まさき), MASA☆KISS (まさ☆キス), Masa (まさ), Masaking (まさキング)
- Birthdate: May 7, 1999 (age 22)
- Birthplace: Hokkaido, Japan
- Blood Type: A
- Height: 156 cm (5 ft 1.4 in)?
- Western Zodiac: Taurus
- Eastern Zodiac: Rabbit
- Hello! Project Status:
- 2011-09-29: Morning Musume Member
- 2021-12-13: Graduated
- UP-FRONT GROUP Status:
- Years in Morning Musume: 10 Years
- Official Kaomoji: 川* ^_〉^)
- Morning Musume Color: Emerald Green
- Audition Song: "Maji Desu ka Ska!" by Morning Musume
- Hello! Project Groups:
- Concert Units:
- Hello! Project Mobekimasu (2011-2013)
- Other Groups:
- See also: List:Sato Masaki Discography Featured In
- [2012.07.11] Greeting ~Sato Masaki~
Solo Fanclub DVDs
- [2017.09.26] Morning Musume '17 Sato Masaki Birthday Event
- [2018.09.26] Morning Musume '18 Sato Masaki Birthday Event
- [2019.09.26] Morning Musume '19 Sato Masaki Birthday Event
- [2020.12.26] Morning Musume '20 Sato Masaki Birthday Event
-  Ou no Tsutome (from Zoku 11nin Iru! Higashi no Chihei, Nishi no Towa)
- [2021.12.14] Egao no Kimi wa Taiyou sa
- [2013.01.29] Alo-Hello! Morning Musume 2012 (アロハロ！モーニング娘。2012) (Sato Masaki version)
- [2013.04.02] Alo-Hello! Morning Musume Tenki Gumi (アロハロ！モーニング娘。天気組) (Sato Masaki version)
- [2011–2012] Hello Pro! TIME (ハロプロ！ＴＩＭＥ)
- [2012–2013] Hello! SATOYAMA Life (ハロー！ＳＡＴＯＹＡＭＡライフ)
- [2014–2019] The Girls Live
-  Hello! Project presents... "Solo Fes!"
-  Suugaku♥Joshi Gakuen (数学♥女子学園)
- [2019–] Aware! Meisaku-kun (あはれ！名作くん)
-  Stacies Shoujo Saisatsu Kageki
-  LILIUM -Lilium Shoujo Junketsu Kageki-
-  TRIANGLE
-  Zoku 11nin Iru! Higashi no Chihei, Nishi no Towa
-  Pharaoh no Haka
-  Pharaoh no Haka ~Hebi Ou Sneferu~
-  Michishige Sayumi no "Mobekimasutte Nani??"
-  Guest, Maachan (ゲスト、まぁちゃん。)
- [2013–2021] Hello! Project Station
- [2014–2016] MUSIC+
- [2015–2016] GREEN ROOM
- [2016–] Upcoming
- [2016–2017] Girls Night Out
- [2017–2021] tiny tiny
- [2018–] OMAKE CHANNEL
-  Hello Pro no Monohon!
- [2019–2020] Hello Pro no Oshigoto Challenge
-  Hello Pro Kouhaku Taiko THE☆BATTLE 2019
-  Hello Pro ONE×ONE
- [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)
- [2012–2021] 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.
- She was voted 5th favorite member in the 2013 "Hello! Project Music Awards" event.
- In Radio bangumi magazine's 7th edition "favorite DJ ranking", readers voted for her as the #1 ranked DJ on AM radio in 2014.
- She was voted most charming member of Morning Musume by Korean fans at a quiz event in Korea in 2016.
- Gallery:Sato Masaki
- Gallery:Morning Musume 10th Generation
- List:Sato Masaki Discography Featured In
- List:Sato Masaki Publications Featured In
- List:Sato Masaki Concert & Event Appearances
- List:Sato Masaki Pocket Morning Weekly Q&A
- Official TikTok
- Morning Musume Profile (archived)
- Morning Musume Tenki Gumi Official Blog