Hamedi, the world junior, cadet and under-21 gold medallist, delivered a superb performance at the Okinawa Prefectural Budo-kanto beat Tanel Paabo of Estonia in the final of the men's over 84 kilograms kumite competition, a result which signals his intentions ahead of the World Championships in Linz later this month.

Rak Won Kim of South Korea and home favourites Daichi Kondo were the recipients of the two bronze medals.

Yves Martial Tadissi of Hungary also got his hands on a first gold medal in the series of World Karate Federation sanctioned events as he overcame Hamedi's team-mate Fahad Alkhathami in the under 67kg kumite weight class.

Bader Alotaibi of Saudi Arabia and Soichiro Nakano of Japan won the bronze medals. 

Only three categories on the programme of the competition in the spiritual home of karate were won by competitors from outside of the host nation, with Russian Vera Kovaleva reigning supreme in the women's over 68kg kumite division.

Kovaleva proved too strong for Spain's Laura Gonzalez in the final, while Lotte Andersen of Denmark and Slovakian Dominika Tatarova picked up bronze.

The plaudits largely belonged to the Japanese athletes as the hosts ended the tournament with a total of 11 gold medals.

Home winners included Chinatsu Endo, who defeated Slovakia's Lucia Kovacikova to take the women's under 50kg kumite crown.

The bronze medals were won by the  Japanese duo Miki Tatebe and Ami Fukigami.

Shiori Nakamura then won an all-Japanese affair in the under 55kg event as she beat Shiho Tokai.

Slovakia's Viktoria Semanikova and Hikaru Furuno also ended their WKF Karate1 Premier League campaigns on a positive note as they both claimed bronze medals.

Japan's success showed little sign of slowing down and they added another title to their growing haul when Misa Iwato beat Ingrida Suchankova in the women's under 61kg kumite gold medal bout.

Bronze medals were clinched by Ayami Moriguchi and Rina Okita, both representing Japan.

The home country virtually monopolised the women's under 68kg kumite category, notching a near clean sweep as Maya Suzuki defeated Mizuki Kikuchi in the final, while Yuka Ishihara secured a bronze medal. 

The other available third place finish went to Sherilyn Wold of The Netherlands.

Japan's triumphant display in Okinawa continued in the men's competitions as Yuta Mori outlcassed Milton De Souza Menezes of Brazil to take gold in the under 75kg kumite event.

Saudi Arabia's Majed Alkhalifah and Hsu Wei-Chun of Chinese Taipei won the bronze medals. 

Mori's victory came after Taihei Hanaguruma had prevailed over Saudi Arabia's Abdullah Alharbi at under 60kg as a pair of Japanese athletes - Naoto Sago and Takumi Imoto - did enough to claim bronze medals.

Makoto Koike completed Japan’s impressive showing in Okinawa with a triumph over Saudi Arabia’s Abdulaziz Alhakami in the under 84kg event.

South Korea's Park Jin Hyeok and Saudi Arabia's Alturkistani rounded off the podium with a bronze medal apiece.