Neru Nagahama

Nagahama has appeared in all singles up until Kuroi Hitsuji, and was also included in crossover groups such as Sakamichi AKB (with Nogizaka46 and AKB48) and IZ4648 (with Nogizaka46, AkB46, and Iz One). After the release of Kuroi Hitsuji in March 2019, Nagahama announced her resignation from the group, citing personal reasons. She officially left the group on 30 July 2019 with a farewell event at Makuhari Messe.

On December 2017, Kodansha announced that they will be publishing a photo-book featuring Nagahama photographed on the Gotō Islands, her hometown. Nagahama was the first member of Keyakizaka46 to release such a book. The photo-book, titled Kokokara (ここから ) , sold 98,000 copies in its opening week, a record only topped Mai Shiraishi's photo-book released earlier in the year. Her photo-book was also awarded by JR Kyushu for promoting tourism within Kyushu. Nagahama was also given the title "tourism ambassador" by Nagasaki.

Nagahama auditioned to be a part of Keyakizaka46; however, despite impressing the judges, she withdrew before the final round of auditions due to her parents' opposition. Later, her parents changed their minds after attending a Nogizaka46 concert in Fukuoka and allowed Nagahama to participate in the new group. With the support of the judges from the auditions, Nagahama officially joined Keyakizaka on November 2015 during the group's weekly variety show, Keyakitte, Kakenai? However, she was designated as a member of a subgroup named Hiragana Keyakizaka46 (けやき坂46, the exact same name but written in kana). Auditions for the subgroup began soon after.