Ryoma Ooka (大岡 凌磨, born 2 October 2001)[1] is a field hockey player from Japan, who plays as a forward.

[2] Ooka made his senior international debut in 2021.

[3] Since his debut, Ooka has medalled at two Asian Champions Trophies.

[4] In 2023, Ooka was named to the national team for the FIH World Cup in Bhubaneswar and Rourkela, as well as the Asian Games in Hangzhou.

[6] This biographical article relating to a Japanese field hockey figure is a stub.