[1] Deguchi participated in AKB48's First AKK Kenky Audience (Force 4), which included 18 people who were accepted as training students on May 27, 2007.
[2]Shizuka Ōya, Amina Sato and Reina Fujie were among her contemporaries at AKB48.
At the Sunflower 1st Stage theater show "Boku no Taiyou", November 26, 2007, she announced her departure from AKB48 on the grounds of wanting to continue her studies.
Deguchi was selected as one of the 16 members of the Senbatsu for the first SKE48 theater performance of Team S 1st Stage "Party ga Hajimaru yo".
Her role as one of the detectives together with Jurina Matsui, Rikako Hirata, and Haruka Ono.