The first final of the day saw world number 31 Hikari Yoshioka upset seventh-ranked Croatian Ana Viktorija to win the under-48 kilogram category in her first tournament outside Japan.

Yoshioka was immensely impressive, winning inside the first minute with two osae-komi.

Bronze went to Hungary's Anna Kriza and Assunta Scutto of Italy.

There was also Japanese joy in the men's under-60kg, Tsujioka Keiji beating Kamran Suleymanov.

Keiji, who beat home hopeful Nursultan Zaizagaliyev in the final four, overcame the Azeri judoka in a highly competitive final, winning by waza-iri.

Zaizagaliyev missed out on the medals entirely after being beaten by compatriot Marlen Adil in the repechage, while the other bronze went to Chyngyzkhan Sagynaliev of Kyrgyzstan, who defeated Azerbaijan's Turam Bayramov.

The women's under-52kg final turned into a marathon, as Veronica Toniolo of Italy and Russia's Liliia Nugaeva battled for nearly 15 minutes before a winner could be determined.

After 10 minutes and 46 seconds of golden score - following four minutes of regulation time - Nugaeva collected a third shido penalty for stepping outside the tatami, handing victory to Toniolo.

Bronze medals went to Mariam Amkhadova of Russia, and Dutch fighter Elin Henninger.

Russia did end the day with gold, however, as Abrek Naguchev eased to victory in the under-66kg.

The world number two had too much for surprise finalist Rostyslav Berezhnyi, the Ukrainian ranked 12th.

Tilegen Tynarbay earned hosts Kazakhstan's fourth medal in two days with bronze, while the other third-place finish went to Brazilian Matheus Pereira.

Competition continues tomorrow with the women's under-57kg and under-63kg, and the men's under-73kg and under-81kg.