Ayase is a Japanese producer and singer-songwriter best known for producing for duo YOASOBI. He originally started out producing songs using VOCALOID, which he released on YouTube and Niconico. Ayase rose to fame in the VOCALOID community with the release of "ラストリゾート"(Last Resort) on April 30, 2019. His first solo album “幽霊東京" (Ghost City Tokyo) was released on November 23 of the same year, and sold out the same day.