How many gold medals did the U.S. women win in the Winter Olympics in Japan?
Since you didn’t specify which Winter Olympics in Japan (they were held there in 1972 and 1998), I have given you both totals. The link provided is the search page of medalists on the IOC webpage. In 1972 at Sapporo, all three gold medals won by the United States were won by women. In 1998 at Nagano, four of the six gold medals won by the United States were won by women, including the win by the US Women’s Hockey team.