Momo Tamaoki won gold in the women's under-57kg division at the Baku Grand Slam ©Getty Images

Japan ended the first day of the Baku Grand Slam atop the medal table after gold medal performances from Rina Tatsukawa and Momo Tamaoki at the Heydar Aliev Sports and Exhibition Complex.

Momo Tamaoki won her second International Judo Federation (IJF) Grand Slam gold of the year following a clinical display against Azerbaijani judoka Ichinkhorloo Munkhtsedev in the women's under-57 kilograms tournament.

She experienced a routine journey to the decider with wins coming against American Mariah Holguin in the semi-finals and Enkhriilen Lkhagvatogoo in the last eight, after receiving a first-round bye.

More joy came for the Japanese in the women's under-48kg.

In her first competition since February 2020, Rina Tatsukawa brushed Austria's Katharina Tanzer aside with a 57-second victory.

The host nation Azerbaijan claimed second position in the table with one gold and one silver after the first day in Baku.  

Orkan Safarov won gold on home soil in the men's under-66-kilograms tournament after downing Denis Vieru of Moldova with three minutes and two seconds remaining.

Safarov won the bout after flipping his opponent on to his back to take the decisive ippon.

It was the 30-year-old's first gold medal at the event since the 2014 edition as well as a bronze in 2017.

Safarov had beaten Ukrainian Yevhen Honcharko, Eric Takabatake of Brazil and Kyrgyzstan's Baibol Salamat Uulu en route to the final.

Hungary's Réka Pupp caused an upset in the women's under-52kg gold medal match by beating British top seed Chelsie Giles.

The bout went to overtime and had to be settled with a golden score from Pupp with 32 seconds left.

The last gold medal of the day went to Georgia's Jaba Papinashvili in the men's under-60kg class.

The unseeded 23-year-old shocked fans when he saw out the final victory against Albert Oguzov of Russia.

Papinashvili had been awarded a waza-ari for an early strike on his opponent and managed to defend the lead.

The action continues tomorrow with four gold medals set to be awarded in the men's under-81kg and under-73kg and women's under-63kg and under-70kg events.