Atsuki Mashiko is a Japanese actor and singer born on January 4, 2000, in Fukushima Prefecture, Japan. He is best known as a member of the dance and vocal group GENIC.

Mashiko gained widespread recognition for his role as Taro Momoi / Don Momotaro in the tokusatsu series Avataro Sentai Donbrothers (2022–2023), part of the long-running Super Sentai franchise.