Jundai Yamada (山田 純大, Yamada Jundai, born 14 February 1973, in Tokyo) is a Japanese actor. His real name is Sumihiro Yamada (山田 純大, Yamada Sumihiro). He is represented with Horipro Booking Agency. His father is actor and singer Ryōtarō Sugi. He graduated from Seijo Gakuen Primary School. After graduating from junior high and high school in Hawaii, he also graduated from Pepperdine University Department of Asian Studies and Department of International Relations. His notable works include Roosevelt Game.