Tetsuto Yamada visited Dodgers Stadium when he participated in a Japan-United States High School Exhibition Series during his third year in high school in 2010. He met Hiroki Kuroda and managed to secure an autographed baseball.
Source: Nikkan Sports 6/30/2016
Yamada signed a multi-year advisory contract with Adidas Japan. He has been working with Adidas since 2014. The length of the contract might be at least four years.