Α-X's

α-X's (アクロス; Across) was a Japanese 17-member training unit belonging to Avex Management.

The unit was formed in April 2016 with 10 male and female members who belong to Avex and aimed to make their debut as a dance vocal group. The 9 finalists of "BOYS & GIRLS Dance Vocal Audition 2016" were added to the unit in April 2017.

Everyone graduated on March 31, 2018.

Team A

 * Atsuki (敦貴) (Founding member)
 * Haruki (遥城) (Founding member)
 * Akari (あかり) (Founding member)
 * Miyu (望優) (Founding member)
 * Ryunosuke (龍乃介) (Joined April 2017)
 * Yuma (悠真) (Joined April 2017)
 * Joe (呈) (Joined April 2017)

Team B

 * Masaki (聖貴) (Founding member)
 * Hibiki (響) (Founding member)
 * Ryusei (流星) (Joined April 2017)
 * Maiki (茉生) (Joined April 2017)
 * Gakuto (牙琥翔) (Joined April 2017)
 * Takumi (匠海) (Joined April 2017)

Team C

 * Riria (里梨愛) (Founding member)
 * Reika (怜伽) (Founding member)
 * Miku (美來) (Joined April 2017)
 * Chisato (千聖) (Joined April 2017)

Former Members

 * Kohei (向平) (Founding member; Left September 30, 2016)
 * Airi (安依里) (Founding member; Left November 10, 2016)

Aftermath

 * Takumi, Miyu, Chisato, Ryunosuke and Haruki joined Jump up Joy in March 2018. The group disbanded in June 2020.
 * Atsuki, Maiki and Joe joined GENIC in 2019.
 * Masaki and Haruki joined ØARCH in December 2019. The group disbanded in October 2021.
 * Masaki joined IVVY in December 2021.
 * Haruki joined FLS in January 2022.
 * Riria joined Nizi Project (2020) placing 12th. She later became a founding member of the group INSPIRE.
 * Ryusei joined ONE HUNDRED LIMINAL in January 2021.
 * Takumi participated in Produce 101 Japan Season2 (2021) placing 5th. He is now a member of INI.
 * Yuma participated in the audition program &AUDITION - The Howling - (2022). He became one of the winners and a member of &TEAM.