Z4-D2

 is a group within Zero Project. The theme of the group is clarity.

The first line-up was announced on November 20, 2021 as additional promotions to Z4 but wouldn't be participating in the unveiling live on the 21st.

The second line-up was announced in March 2022.

Current Members

 * Aizu Mei (藍住明以) (Joined May 2022)
 * Kanzaki Chisato (神崎千聖) (Joined March 2022)
 * Sato Haru (砂糖はる) (Joined May 2022)
 * Shimizu Erika (清水絵里花) (Joined May 2022)
 * Murasame Rena (紫雨レナ) (Joined May 2022)
 * Rin (凜) (Joined May 2022)

Former Members

 * Hanasaki Lisa (華咲りさ) (Founding member)
 * Kusaka Hiiro (日下緋彩) (Founding member)
 * Soli (소리) (Founding member)
 * Aizome Kyoka (愛染杏華) (Joined March 2022)
 * Hoshimiya Rin (星宮りん) (Joined March 2022)
 * Minami Nanami (美波ななみ) (Joined March 2022)
 * Yukino Mahiro (雪野まひろ) (Joined March or April 2022)