Japan's star judo siblings Hifumi and Uta Abe won the men's 66-kilogram and women's 52-kg categories, respectively, at the world championships Monday, claiming gold medals on the same day for the third straight year.

With their parents watching from the stands, the Tokyo Olympic gold medalists each picked up a second consecutive and fourth career world title, with Hifumi defeating long-time rival Joshiro Maruyama in an all-Japanese final on Day 2 of the championships in Doha, Qatar.

Japan's Hifumi Abe (L) and his younger sister Uta Abe pose with their gold medals after winning the men's 66-kilogram and the women's 52-kilogram titles at the judo world championships in Doha on May 8, 2023. (Kyodo)

Hifumi's victory in the match that lasted more than 10 minutes came when two-time world champion Maruyama received his third shido, or a minor violation, of the contest after Hifumi had a period of total control.

The 25-year-old improved his head-to-head record against the 29-year-old Maruyama to 7-4, winning the last five.

Japan's Tokyo Olympic champion Hifumi Abe (white) takes on compatriot Joshiro Maruyama in the men's 66-kilogram final at the judo world championships in Doha, Qatar, on May 8, 2023. (Kyodo) ==Kyodo

"I was able to pursue my ideal way of fighting -- giving him no chance to take the initiative," Hifumi said. "I fought with strong determination in the final. I think I showed my strength as an Olympic champion."

"I'll try to be the embodiment of Japanese judo that comes to people's mind first when they think of the sport."

Japan's Tokyo Olympic champion Hifumi Abe reacts after beating compatriot Joshiro Maruyama in the men's 66-kilogram final at the judo world championships in Doha, Qatar, on May 8, 2023. (Kyodo) ==Kyodo

Before her brother's triumph, Uta wrapped up her dominant run with an ippon victory over Uzbekistan's Diyora Keldiyorova in her final.

The 22-year-old Uta won all five of her matches by ippon, including her quarterfinal against Amandine Buchard of France, whom she defeated in the Tokyo Olympic final.

Japan's Tokyo Olympic champion Uta Abe (white) competes against Uzbekistan's Diyora Keldiyorova in the women's 52-kilogram final at the judo world championships in Doha, Qatar, on May 8, 2023. (Kyodo) ==Kyodo

"I'm glad I won the final with a ground technique," Uta said. "Some of my moves were better than I imagined myself, so I'm a little bit satisfied today."

"But my fight will go on. I'll continue to work hard."

Japanese Tokyo Olympics gold medalists Hifumi Abe (L) and his younger sister Uta celebrate together after claiming gold in their respective divisions, 66 kilograms and 52 kilograms, at the judo world championships in Doha, Qatar, on May 8, 2023. (Kyodo) ==Kyodo

With their titles, the siblings have taken major steps toward Paris Olympic berths.

Among individual neutral athletes, designated as AIN, competing at the judo worlds, Russian Yago Abuladze, the 2021 world champion at 60 kg, lost in the men's 66-kg quarterfinals.

Related coverage:

Judo: Tsunoda wins 3rd world title, Olympic champion Takato falters

Judo: Ukraine to boycott world c'ships over IJF stance on Russia

Judo: Olympic great Shohei Ono confirms retirement, plans for coaching