<page_title> Chronological summary of the 2012 Summer Olympics </page_title> <section_title> Day 3: Mon 30 July </section_title> <table> <cell> Judo <col_header> Gold medalists </col_header> <col_header> Sport </col_header> </cell> <cell> Women's 57 kg <col_header> Gold medalists </col_header> <col_header> Event </col_header> </cell> <cell> Kaori Matsumoto <col_header> Gold medalists </col_header> <col_header> Competitor(s) </col_header> </cell> <cell> Japan <col_header> Gold medalists </col_header> <col_header> NOC </col_header> </cell> </table>
Kaori Matsumoto won Japan's first gold medal in the 2012 women's Judo games.