Bottaro continued her run of causing shocks at the competition in the Turkish city as she edged the Japanese star 3-2 in the final at the Asli Çakır Sports Hall.

"I am so, so happy," the victorious Italian said. 

"Kiyou Shimizu is a big champion and I have always admired her, so it makes me extremely happy that I could finally defeat her. 

"This is the reward for so much effort and so many sacrifices that I have made. 

"I would like to dedicate this medal to my family, my boyfriend, and to all the staff of the Italian team that have helped me so much to be here."

Japan bounced back in the men's kata competition as Ryo Kiyuna, also a two-time world champion, claimed an 18th consecutive medal as he beat team-mate Kazumasa Moto 3-2.

Hiroto Gomyo was the other Japanese gold medallist on the final day of the event as he topped the podium in the men's under-67 kilograms kumite division with a narrow 1-0 win over Iran’s Seyedali Karimi.

Elsewhere, there was further success for the Italian team as Sara Cardin clinched the women's under-55kg kumite honours by defeating Chinese Taipei Tzu-Yun Wen.

Switzerland's Elena Quirci, the reigning European champion, won the under-68kg division after she overcame Japan’s Mizuki Kikuchi 3-2 in a hard-fought final.

Turkish talent Eray Samdan was unable to win gold in front of a home crowd as he lost 3-1 to reigning world champion Amir Mehdizadeh of Iran in the men's under-60kg final.

Merve Coban ensured a Turkish karateka tasted victory on home soil as she defeated world champion Alisa Buchinger of Austria by decision after their under-61kg gold medal bout ended in a 1-1 draw.

The Karate 1-Premier League will travel to Berlin for the sixth leg of this year's series between September 14 and 16.