Hoshizaki Mashiro

Hoshizaki Mashiro (星崎真白) is a Japanese singer and former member of the idol group Untitled. Born in western Tokyo on June 12, Mashiro attended the Dance & Vocal Course at Tokyo School of Music & Dance and made her idol debut with Untitled on October 1, 2023. She remained with the group until its disbandment on March 28, 2026. During her time with Untitled, she took part in the group’s live activities and releases.

In an interview on TBS Radio in December 2024, Mashiro said that she had wanted to stand out since childhood, which led her to start dancing at a young age and eventually pursue a career in music. She explained that she chose the idol path because she wanted to make singing and dancing her profession. Asked about her dream, she answered simply that she wants “to become big.” She also encouraged younger people hoping to enter the industry to speak openly about their dreams, take action, and work with passion and courage, saying that dreams can come true if you pursue them wholeheartedly.

01/10/2023

Joined Untitled

28/03/2026

Graduated from Untitled along with the group disbanding