Tatsuya Hayama

December 24, 1991 — Yokohama, Kanagawa, Japan

Tatsuya Hayama, better known by his ring name DOUKI, is a Japanese professional wrestler signed to New Japan Pro-Wrestling (NJPW), where he is a member of the Just 5 Guys. Douki was a part of the Suzuki-gun stable from 2019 till the faction's disbandment in 2022. He is a former IWGP Junior Heavyweight Champion.