Azuki (正岡小豆) is is a Japanese VOCALOID developed and distributed by YAMAHA Corporation in collaboration with SEGA. She was released for the VOCALOID4 engine in July 2017. She is voiced by Yuka Outsubo, a professional voice actress and singer. On July 12, 2017, Azuki and fellow Project 575 character, Kobayashi Matcha, were released on the VOCALOID4 engine. Hiro Kanzaki designed their new VOCALOID4 designs and Yuka Outsubo reprised her role for Azuki. While the AZUKI and MATCHA packages are available normally separately, for a limited time, users could purchase them together for a discounted price.