Career
Oshima passed AKB48"s 13th generation auditions on September 9, 2011. Her debut was on December 8, 2011 at AKB48"s 6th anniversary stage performance. In August 2012, she was promoted to Team A. She started activities as a Team A member in November 2012.
In February 2014, during the AKB48 Group Shuffle, it was announced Oshima would be transferred to Team B. In the group"s general elections in 2014, Oshima ranked for the first time at 80th position.
Her first senbatsu single was Kibouteki Refrain, and she was the first 13th generation member to be selected for senbatsu. Stage units AKB48 Kenkyuusei Stage "RESET" "Kokoro no Hashi no Sofa" (心の端のソフャー) Team A Waiting Stage "Skirt, Hirari" (スカート、ひらり) "Tenshi no Shippo" (天使のしっぽ) "Tsundere!" (ツンデレ!) AKB48 Team B 3rd Stage "Pajama Drive" (パジャマドライブ) (Revival) "Pajama Drive" (パジャマドライブ) television variety Ariyoshi AKB Kyowakoku (有吉AKB共和国) (since 2012) AKB Nemousu television (AKBネ申テレビ) (since 2012) AKB48 no Anta Dare? (AKB48のあんた、誰?) (since 2012) AKBingo! (since 2013) Musicals AKB49 Stage Play (2014).