During this period, Miyazawa participated in the title tracks of 25 of the 27 AKB48 single releases, missing only the A-sides of "Chance no Junban" and "Ue kara Mariko", for which the featured members were determined by a rock-paper-scissors-tournament.
[3] Although this underlines her role as one of the promotional fixtures of the group at that time, she did not reach the popularity level of fellow members like Atsuko Maeda or Oshima Yuko.
[6] In March 2012, during AKB48's trip to the National Cherry Blossom Festival, Miyazawa visited the Strong John Thomson Elementary School in Washington, D.C., to explain Japanese pop culture to the pupils.
[7] In August 2012, it was announced that Miyazawa and fellow AKB48 member Mariya Suzuki would be transferred overseas to help lead Shanghai-based sister group SNH48.
[17][18] In January 2013, during the annual "Request Hour" concerts held by all Japanese AKB48 acts, the Miyazawa-led song "Kiseki wa Mani Awanai" ranked second in fan voting.
[25] As a result, she did not participate in the rock-paper-scissors tournament in 2013[26][27] and rarely appeared with the group until February 2014, when AKB48 announced Miyazawa's transfer to Nagoya-based SKE48 at the Grand Reformation Festival, while staying a concurrent member of SNH48.
[29] However, she suffered a significant decrease in popularity in the process, as she lost over 21000 votes compared to 2013 in the 2014 AKB48 general election, but still managed to maintain the 12th position overall.
Following this, the Miyazawa-centered song "Kiseki wa Mani Awanai" was voted into the first place in the 2016 edition of the Request Hour concert series.
[41][42] In July 2014, it was announced that she would play the male lead role in the stage adaption of the manga "AKB49: Ren'ai Kinshi Jōrei".
[44] In March 2015, she performed in the gala concert celebrating the 20th anniversary of the stage play series Gorgeous Earth, she appeared in 2013/2014.
[45] Some months later, it was announced that Miyazawa would perform in the stage adaptation of the popular shōjo manga "Crest of the Royal Family" by Chieko Hosokawa, scheduled for 2016.
[46] After finishing the play, Miyazawa collaborated with the cosplay boy group ARSMAGNA on their single Kibun Joujou, and concluded the year by scoring a main role in the TV Asahi drama Ossan's Love.
[49][50] Miyazawa, who is often called "Sae-chan" (さえちゃん) by fans and media,[51] belonged to the most popular members of the 48 group family with consistent high finishes in audience polls.
In the AKB48 general elections, in which the lineup (called "senbatsu") for a given single is decided by fan voting, she placed 14th (2009), 9th (2010), 11th (2011), 11th (2012), 10th (2013), 12th(2014), and 8th (2015), respectively, which gave her a spot on the related title tracks.
Song participiations aside from single title track recordings: She participated in the first two incarnations of Team Surprise, a subunit formed for a Pachinko machine campaign, but was not selected for the third: Aside of numerous appearances in most of the group's house shows (most notably AKBingo!, AKB48 Nemousu TV (AKB48ネ申テレビ), Shukan AKB48 (週刊AKB), AKB to ××!, SKE48 Ebisho!, or SKE48 EbiCalcio), Miyazawa is also frequently appearing in Japanese variety shows.