Yoshimura made her international debut for Japan at the 2006 Pacific Junior Curling Championships, playing lead for Team Japan, skipped by Megumi Kobayashi. They would win a silver medal. Yoshimura did not return to the Pacific Juniors until 2011, when she skipped Japan to a gold medal at the 2011 Pacific Junior Curling Championships, qualifying her nation for the 2011 World Junior Curling Championships. There, she led Japan to a 3–6 record, finishing in eighth place. Also that season, she skipped Japan at the 2011 Winter Universiade, finishing in fourth.