North Korea's Kye Sun ended the 84-match winning streak of Japan's Ryoko Tamura with a victory in the women's extra-lightweight division as Olympic judo competition ended.
In the men's event, Tadahiro Nomura of Japan stopped Girolamo Giovinazzo of Italy to capture the under-132-pound class.
Hillary Wolf of Chicago, an actress who starred in the "Home Alone" movies, lost to Cuba's Amarilis Savon in the quarterfinal.
Clifton Sunada of Honolulu lost his first-round match to Germany's Richard Trautmann.
Both Americans advanced to the repechage round but failed to go further. Algeria's Salima Squakri eliminated Wolf and Belarus's Natik Bagirov beat Sunada.
Kye's victory was a major upset.
The last time Tamura lost was as a 16-year-old in the 1992 Olympic final to France's Cecile Nowak.
Amarilis Savon of Cuba and Yolanda Soler of Spain took the women's bronze medals.
In the men's extra-lightweight final, Nomura was in the lead throughout the match and cemented the victory with a late takedown that gave Japan its third gold medal of the competition.
The men's bronze medals went to Germany's Richard Trautmann and Dorjpalam Narmandakh of Mongolia.
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MEDALISTS / JUDO
Men's Extra Lightweight
GOLD: Tadahiro Nomura, Japan
SILVER: Girolamo Giovinazzo, Italy
BRONZE: Richard Trautmann, Germany and Dorjpalam Narmandakh of Mongolia
Women's Extra Lightweight
GOLD: Kye Sun, North Korea
SILVER: Ryoko Tamura, Japan
BRONZE: Amarilis Savon, Cuba and Yolanda Soler, Spain