Yuichanzu, TechiNeruYuichanzu, SakamichiAKB
A girl who always dreamed of entering the world of singers and show business. She's a former junior idol who has entered various auditions, including an appearance in the TV Show Sing!Sing!Sing prior to her Keyakizaka46 days. She was part of the idol group Smile Gakuen（スマイル学園) under the name Kashiwagi "Yuiful" Yui.
She also said she had already participated in street performances and she plays a number of instruments like piano (12 years), flute (2 years) and drums (1.5 years). With 4 eldest brothers, she is the youngest in her family.
Yui went on hiatus from April 2017 to August 2017 due to health condition, when she returned, she said during an interview that she was considering graduating but gave up on the idea. During that time, her spot in any performance as well as in the MV for Eccentric was left empty.
Her audition song was Hanamizuki (Hitoto Yo) and her favorite Nogizaka46 member is Hori Miona.
She announced her graduation from the group on August 7th, 2018. Making her solo song Hi ga Noboru Made (Until the Sun Rises), included in the 7th single Ambivalent, her last contribution to the group.