Momoiro Clover Z member Ayaka Sasaki celebrated her 30th birthday on June 11 with the announcement of a new solo song, titled "30 STREET!!!"

Named after a playful English take on the Japanese term "misoji" (30 years old), the song carries a positive message about moving forward into her thirties while staying true to herself.

The track was written and composed by Kenichi Maeyamada (Hyadain), a longtime collaborator who has contributed numerous songs for Momoiro Clover Z and Sasaki's solo projects. The arrangement was handled by handled by Hirotaka Hayakawa and Leo Kawahara.

Maeyamada shared "She's turning 30, but apparently she didn't have anything specific she wanted to say about it, so that's the kind of song we ended up making." He also explained the title, saying, "Thirty years old. Misoji. In English, that's '30 STREET!!!'"

Alongside the song's release, several upcoming projects were announced, including the exhibition "A-rin Museum" in Tokyo from July 31 to August 2, a fan tour to Malaysia titled 'AYAKA VACATION' in September, and a solo concert at Tokyo Metropolitan Gymnasium on January 30, 2027