- Name: Iriuchijima Sayaka (入内嶋涼)
- Nickname: Saaya (さあや), Saa-chan (さあちん)
- Birthdate: May 13, 1999
- Birthplace: Kanagawa, Japan
- Blood Type: O
- Height: 154cm
- Hobbies: Playing with living things, observing people
- Specialties: Swimming, number plays
- Bands / Groups:
SKE48 Song Participation
|Souyuutoko Aru yo ne?||Koi no Konkyo||Highway Girls|
|Koiochi Flag||Koiochi Flag|
|Ano Koro no Kimi wo Mitsuketa||Sekai no Superhero|
- She had her official debut as a ninth generation Kenkyuusei member on December 31, 2018 at the SKE48 theater. She was promoted to Team KII on October 5, 2020.
- Her favorite colors are purple, white, and red.
- Her future dreams are to make people around her smile and be happy, to be a person who seems to be "good to it leave to."
- Her favorite foods are gummies, pizza, and takoyaki.
- Her favorite words are "ima shika dekinai koto wo tanoshiku zenryoku de!" (今しか出来ないことを楽しく全力で！).
- Her message is "I will do my best with all my strength as I was chosen as 9th generation member! Because I came to change my life." (SKE48 ９期生に選ばれたからには全力で頑張ります！人生を変えに来たので。)