On September 20, 2024, STARTO ENTERTAINMENT announced that A.B.C-Z member Ryoichi Tsukada sustained a back injury during concert rehearsals on September 15. As a result, the group will modify some aspects of their performances for the "A.B.C-Z Concert Tour 2024 F.O.R," starting on September 23 at Kumamoto Castle Hall in Kumamoto Prefecture.

Despite the injury, Tsukada expressed a strong desire to participate in the tour. After consulting with doctors, who advised him to limit his physical activity, the decision was made to adjust the show’s staging to accommodate his condition.

In a statement from STARTO ENTERTAINMENT, they expressed gratitude for the continued support of A.B.C-Z fans and confirmed that while Tsukada’s performances will be restricted, the group will do their best to support his recovery. The message concluded with an apology for any concerns caused and a commitment to Tsukada performing at his maximum capability under the circumstances.

Tsukada also issued a personal message, apologizing for the concern and inconvenience. He shared that the injury occurred during rehearsals but assured fans that he would prioritize healing and perform to the best of his ability. He thanked the A.B.C-Z members and staff for their support and emphasized how important his health has become to him during this time.

The tour will continue with changes in place, and fans are encouraged to support Tsukada through his recovery.