Ukka

Ukka, formerly known as Sakura Ebis, is a Japanese idol group formed in May 2015 under Stardust Promotion. They are the younger sister group of Shiritsu Ebisu Chugaku and debuted at the Tokyo Idol Festival. Initially starting as a four-member group, ukka has evolved over the years with changes in membership. Their music often explores themes that blend elements of both music and literature, focusing on bittersweet and nostalgic stories. The group's current lineup includes members like Riju Murahoshi, Yuu Miyazawa, and Koharu Wakana, among others. Ukka is known for their unique approach, rejecting traditional idol practices, such as member colors or specific fan nicknames. They have released various albums and EPs, though my database does not contain specific information on the recent releases you've mentioned.

Ukka's transformation from Sakura Ebis to ukka occurred on November 16, 2019. The group's members also participate in modeling and acting, highlighting their diverse talents beyond music. Their style is characterized by cool and stylish performances that set them apart from other idol groups. Despite the changes in their lineup over the years, ukka continues to maintain an active presence in the Japanese music scene.