The group was formed in phases:
- On March 2019, nine different combinations were offered to be chosen from.
- On May 2019, the unit compositions were revealed, and people were asked to submit names for them.
- On May 2019, the choices for unit names were revealed.
- On June 2019, the chosen unit names were revealed.
Due to the image presented by the group, many of the name submissions had meanings that emphasize the hardworking, passionate, and dream-filled personalities of its members.
A・ZU・NA comes from the syllables of the names of its members: "A" from "Ayumu", "ZU" from "Shizuku", and "NA" from "Setsuna". Azuna also happens to be a female given name in Japanese.
Other highlighted submissions are "Dramatic Hour" and "SHO☆JO".
A・ZU・NA's first single is "Dream Land! Dream World!".
Release Date: February 12, 2020