LIGHTSUM to make Japanese debut with new album next month

by Joonha Yoo Posted : August 18, 2026, 16:22Updated : August 18, 2026, 16:23
LIGHTSUM poses in a concept image for “Reidol” the group’s first Japanese mini album Photo courtesy of Cube Entertainment
Courtesy of Cube Entertainment
SEOUL, August 18 (AJP) - K-pop girl group LIGHTSUM will make their Japanese debut late next month with the release of their first full-group album in two years, their agency Cube Entertainment said on Tuesday.

Set for release on Sept. 23, their Japanese mini album "Re:idol" includes five tracks such as "Doushite," "Fallin' World," "Stop and Go," "夜を歩く君へ" and "POSE! (Kawaii ver.)," a cuter version of the group's 2023 digital single "POSE!"
 
K-pop girl group LIGHTSUM appears in a promotional image for its Japanese debut mini album “Reidol” set for release on Sept 23 Courtesy of Cube Entertainment
Courtesy of Cube Entertainment
Cube Entertainment is also promoting the release with a reality series, also titled "Re:idol," which has aired on the Japanese streaming platform ABEMA every Sunday at 10 p.m. since Aug. 9.

The series offers a glimpse into the group's preparations for their Japan debut. Former 4Minute member Kwon So-hyun, a senior artist from Cube Entertainment, also appears in the series, offering advice and support to the group.

AJP Takeaways
· LIGHTSUM will make their official Japan debut on Sept. 23.
· The debut Japanese mini album, "Re:idol," marks the group's first full-member release in about two years.
· The album contains five tracks including four new songs and "POSE! (Kawaii ver.)."