Hamu!STAR

 (はむ！STAR) is currently a three-member Japanese trainee idol group originally formed with three members on August 31, 2019, under SISTERMANAGEMENT as a part of DIANNA Project.

They're DIANNA Project 's first trainee group consisting of members from DIANNA Project Renshuusei.

The founding members are Kamuro Yuzuki, Hattori Rua, and Uchiumi Honoka.

On June 19, 2022, three members, Yamashita Ria, Hirose Juri, and Mirai Yui graduated from Hamu!STAR to form Kocchi Muite Darling.

On March 26, 2023, Umesaki Seria and Miyata Ryoka got promoted to Kocchi Muite Darling.

On May 6, 2023, Ruko graduated.

Current Members

 * Wakana (和奏) (Joined May 11, 2022)
 * Nakanishi Mimisa (中西みみさ) (Joined May 12, 2022)
 * Mei (めい) (Joined April 21, 2023)

Former Members

 * Reira (玲愛) (Joined August, 2020; left September 2020)
 * Kamuro Yuzuki (加室柚希) (Founding Member; graduated March 21, 2021)
 * Hattori Rua (服部琉愛) (Founding Member; graduated March 21, 2021)
 * Airi (愛梨) (Joined August, 2020; graduated August 22, 2021)
 * Iwamoto Himari (岩本妃茉莉) (Joined July 12, 2020 ; graduated November 20, 2021 )
 * Ariru (杏璃琉) (Joined May 31, 2021; graduated February 27, 2022 )
 * Yamashita Ria (山下莉愛) (Joined December 2, 2019; graduated June 19, 2022)
 * Hirose Juri (広瀬じゅり) (Joined July 12, 2020 ; graduated June 19, 2022)
 * Mirai Yui (琉桜ゆい) (Joined August, 2020; graduated June 19, 2022)
 * Sasaki Rikka (佐々木りっか) (Joined March 31, 2022; graduated October 23, 2022)
 * Uchiumi Honoka (内海穂乃花) (Founding Member; graduated December 25, 2022)
 * Umesaki Seria (梅咲せりあ) (Joined November 22, 2021; graduated March 26, 2023)
 * Miyata Ryoka (宮田涼花) (Joined May 10, 2022; graduated March 26, 2023)
 * Ruko (瑠香) (Joined August, 2020; graduated May 6, 2023)

Collaboration Video Releases

 * 1) [2020.06.15] OUCHI DE GIRLS BOUQUET LIVE-1 (w/ MERUCHU, RABBIT HUTCH, and additional trainees)
 * 2) [2020.06.15] OUCHI DE GIRLS BOUQUET LIVE-2 (w/ MERUCHU, RABBIT HUTCH, and additional trainees)
 * 3) [2020.10.05] GIRLS BOUQUET EXRA vol.1 LIVE-1 (w/ MERUCHU, RABBIT HUTCH, meow, and additional trainee)
 * 4) [2020.10.05] GIRLS BOUQUET EXRA vol.1 LIVE-2 (w/ MERUCHU, RABBIT HUTCH, meow, and additional trainee)

Trivia

 * Their name means Hamster (ハムスター).
 * Their official color on DIANNA Project's website is.