Ryosuke "Dr. R" Sakai is a Japanese producer Poppy and Titanic Sinclair worked with to create Poppy.Computer.

His website says learning classical piano from childhood, he woke up to rock in high school days and turned into a guitarist and then gradually began to beat the AKAI MPC 2000 beat make-up deeply into black music. Acting in a club scene while studying at a dental university, he began to study self-taught music production. His musical background is broad from pop music to electro, country, hardcore rock, hip hop and R&B.

Poppy Songs He Has Produced