Prior to joining Hello! Project, she was a member of the Oita local idol group SPATIO.
Goto Sayaka was born on August 31, 2003 in Oita, Japan.
Over the summer, Goto participated in the Hello! Project Shin Member Audition for a chance to join Hello! Project in commemoration of its 20th anniversary and made it to the finals alongside seven others before it was ultimately decided that no one would pass the audition.
Following the audition, Goto accepted an invitation to join Hello Pro Kenshuusei and she was introduced alongside six other finalists at the Hello! Project Kenshuusei Happyoukai 2017 12gatsu ~Conti→New!~ show on December 10.
As of April 2020, Goto is in her second year of high school.
- Name: Goto Sayaka (後藤咲香)
- Nickname: Saaya (さあや)
- Birthdate: August 31, 2003
- Birthplace: Oita, Japan
- Height: 158cm
- Western Zodiac: Virgo
- Eastern Zodiac: Goat
- Hello! Project Status:
- 2017-12-04: Hello Pro Kenshuusei member
- 2018-02-09: Left
- UP-FRONT PROMOTION Status:
- 2017-12-04: Member
- 2018-02-09: Left
- SPATIO Member Color: Purple
- Hello! Project Groups:
- Hello Pro Kenshuusei (2017-2018)
- Other Groups:
- SPATIO (2017)
-  Shoujotachi no Ketsudan ~Mitchaku!! Hello! Project 20 Shuunen Audition~ (AbemaTV)
-  Hello! Project Station
- She's a fan of Keyakizaka46 and TWICE.
- She was the first Hello! Project member from Oita prefecture.
- It took at least 4 hours for her to travel from Oita to Osaka for lessons.
- She had the second quickest withdrawal from Hello Pro Kenshuusei after Sezaki Azusa, similarly both Sezaki and Goto only participated in their introductory concerts.
- She shares the same last name with former Morning Musume member Goto Maki, and THE Possible member Goto Yuki.
- ↑ "さあやspatio卒業のお知らせ" (in Japanese). SPATIO Official Website. 2017-10-16.
- ↑ Shoujotachi no Ketsudan ~Micchaku!! Hello! Project 20 Shuunen Audition~ Episode #1. AbemaTV. 2017-11-13.
- ↑ Shoujotachi no Ketsudan ~Micchaku!! Hello! Project 20 Shuunen Audition~ Episode #6. AbemaTV. 2017-12-04.
- ↑ "ハロプロ研修生に新メンバーが加入！" (in Japanese). Hello! Project. 2017-12-11.
- ↑ "Hello! Project 研修生発表会 2018 3月 〜さくら〜" (in Japanese). UP-FC. 2018-02-09.