Immediately following the 2017 Indy 500, I did a live painting of the winner in the Firestone hospitality chalet at the Speedway. As I was about to finish both Takuma Sato and team owner Michael Andretti came by to celebrate with us and sign the painting. Taku signed his name in traditional Japanese!
See a quick video:
I have a very few prints produced which were signed by Takuma.