Ryuudai Abe (阿部 隆大, Abe Ryūdai, November 2) is a Japanese composer, arranger, and guitarist from Tokyo.

Since 2006, he has been in charge of guitar as a member of ACRYLICSTAB. In addition to providing music to artists based on rock and electro, he provides music for games and other video works. He is also active under the name of “Abelyudai”.