Chika Ishimaru announced her graduation from SUPER☆GIRLS on October 26. Her graduation ceremony will be held on December 31, due to her contract with Avex to expire. Chika joined the idol group in December 2018 along with the other members of CHAPTER 4.

Her final work with the group is "NIJIIRO Road☆", lead track from their 10th anniversary compilation "Chouzetsu Shoujo☆COMPLETE 2010~2020", to be released on December 23, prior to Chika's graduation.

Source: LSH