Harasawa bounced by Czech Krpalek at world judo

Czech giant Lukas Krpalek beat Japan's Hisayoshi Harasawa to capture judo's world heavyweight title on Saturday and fire a warning for next year's Tokyo Olympics.

The hulking 28-year-old won half-heavyweight gold at the 2016 Rio Olympics and looked ominously strong after stepping up to the +100-kilogram class.

Entering with a roar at Tokyo's iconic Budokan, venue for the 1964 Tokyo Games and next year's Olympics, Krpalek was awarded victory after Harasawa picked up his third penalty deep into the golden score.

Harasawa, the 2016 Rio Olympic silver medallist, had stunned Georgian giant Guram Tushishvili in the semi-finals, robbing him of his world title.

In the absence of France's Olympic champion Teddy Riner, the 27-year-old ran out of steam in the final, although still secured an upgrade on the bronze medal he won at last year's world championships in Baku.

Earlier, Japanese teenager Akira Sone bagged gold on her world championship debut, upsetting Cuba's former Olympic champion Idalys Ortiz in the women's heavyweight final.

The 19-year-old Asian Games gold medallist quickly forced Ortiz onto the back foot, sustained pressure bringing a third penalty against the +78-kilo division's top-ranked fighter and giving Sone victory.

"All I was thinking about today was winning that gold medal," said a sweat-drenched Sone after capturing Japan's fourth gold of the week.

"I was determined not to show any weakness or give her any opening because she's so strong. I didn't care how I won, I just wanted it so badly.

"I tried to attack and set the tempo," added the Fukuoka native.

"The goal now is to do the same at the Tokyo Olympics and make sure I win gold there too."