|Birthdate||March 11, 1998|
|Current Age||25 Years Old|
|Idol Career Info|
|Debuted||December 2018 / 9th Generation|
Oba Sayaka was a SKE48 Kenkyuusei.
- Hobbies: Traveling, reading essays, sharing information on beauty
- Special skill: Cashiers quickly, travel coordinates, piano
- Future dream: Becoming a mystery hunter, appearing on a wide show or traveling program, writing an essay (of travel)
- Favorite food: Seafood, strawberries, noodles, hamburger, shabu-shabu
- Favorite word: "If you want to be loved, love yourself first".
- A short message: I am not experienced at singing and dancing, I think that the start from 20 years old is a minus point, but please do not take your eyes off as I will do my best to be positive!
- Admired members: Soda Sarina
- Admired former members: Kizaki Yuria, Ogiso Shiori
- Failed Nogizaka46's 3rd Generation Auditions
- She has been to 10 countries in total
- On May 15, 2019 it was announced on SKE's website that Oba has quit the idol group on that day.
- SKE48 Kenkyuusei → Graduation