Tsutomu Aoki (青木 努, Aoki Tsutomu; born June 27, 1959), better known by his stage name Twotone Aoki (ツートン青木, Tsūton Aoki) is a Japanese impressionist from Kanagawa Prefecture. His son, Ryūji Aoki, is also an impressionist.
Source: “Twotone Aoki”, English Wikipedia (CC BY-SA 4.0), excerpt