The 2021 Japanese mixed doubles curling Olympic trials were held from September 18 to 20 at the Wakkanai City Midori Sports Park in Wakkanai, Japan.

[1] The winning pair of Chiaki Matsumura and Yasumasa Tanida earned the right to represent Japan at the Olympic Qualification Event where they finished with a 2–4 record, not advancing to the 2022 Winter Olympics in Beijing, China.

[2] The event was held in a double round robin format between three teams: the 2020 Japanese Mixed Doubles champions Chiaki Matsumura and the Yasumasa Tanida, the 2021 Japanese Mixed Doubles champions Yurika Yoshida and Yuta Matsumura and the points leaders on the World Curling Tour as of January 1, 2021 Tomoko Takeda and Naomasa Takeda.

[3] After the round robin, the top two teams advanced to a best-of-three series to determine the champion.

[4] The teams are listed as follows:[3] Final round-robin standings All draw times are listed in Japan Standard Time (UTC+09:00).