The Japanese youngster is a big home hope for gold when skateboarding makes its Olympic debut at Tokyo 2020 next year and won her world title in São Paulo in September.

She again starred in Brazil in Rio, winning the competition which is part of the qualification process for Tokyo 2020.

Okamoto scored 62.67 points to lead a Japanese 1-2 over Sakura Yosozumi, who managed 58.00.

Britain's Sky Brown, who is herself only 11, won bronze on 55.00.

In the men's park Corey Juneau triumphed for the United States as Americans claimed all of the top five positions.

He registered a score of 90.50 with Jagger Eaton on 89.25 and Ben Hatchell on 85.00 in second and third.

American world champion Heimana Reynolds did not make the final.

Japan also won the men's street title thanks to Sora Shirai's score of 35.34.

Jake Ilardi of the US ended second on 35.24 and bronze went to home Brazilian rider Lucas Rabelo on 34.39.

World champion Nyjah Huston of the US finished in seventh place.

In the women's street, world champion Pamela Rosa collected a home win for Brazil, scoring 18.49.

Her team-mate Rayssa Leal ended on 17.09 in second and Japan's Aori Nishimura was third with 15.60.

Olympic qualifying continues until June, with the next major competition being the Dew Tour in California in May.