[8][9] Rankings in the round-robin stage were determined by win/loss percentage, with additional tie-breakers on head-to-head record and goal differential, although these were not ultimately necessary.

Tarni Stepto replaced Parnaby on the mound mid–inning, allowing a hit and sacrifice fly to give Japan a 6–1 lead.

Miu Goto came in after Ueno allowed a one-out walk in the fifth inning and struck out Chelsea Forkin with the bases loaded to end Australia's threat.

In the bottom of the fifth, Yu Yamamoto ended the game on a homer to center field, making it 8–1 and triggering the Olympics run-rule victory.

In the bottom of the fourth, a walk, sacrifice bunt, and Michelle Moultrie single gave the United States a 1–0 lead.

Alexia Lacatena replaced Cecchetti, and the United States scored its second run on a Janie Reed sacrifice fly.

In the seventh inning, Monica Abbott replaced Osterman and struck out the side to give the United States a 2–0 win.

Three years after recovering from Legionnaires' disease, Sara Groenewegen started on the mound for Canada and retired the first six Mexican batters.

Jenna Caira replaced Groenewegen in the fifth, and Danielle Lawrie came on in the sixth for Canada and pitched the remainder of the game to record the save.

Yamato Fujita opened the scoring in the bottom of the second with a solo home run, her second of the tournament, to give Japan a 1–0 lead.

Anissa Urtez tied the game for Mexico with a fifth inning solo home run to center field.

Anissa Urtez hit a fly ball to center field which Eri Yamada dropped, scoring Suzy Brookshire and tying the game.

[22][23] Australia and Canada began the second half of the group stage, now in Yokohama after the previous day's opening ceremony.

Facing Sara Groenewegen, Australia loaded the bases in the first with no outs on a Leigh Godfrey single, Stacey Porter ground rule double, and Taylah Tsitsikronis hit by pitch.

In the bottom of the second, a throwing error by Chelsea Forkin at first base plated another run for Canada, and they made it 6–1 after a ground rule double by Erika Polidori.

Emma Entzminger knocked in another run in the fourth inning with the bases loaded to give Canada a 7–1 lead, with Lauren Regula pitching the seventh to end the game.

Tarni Stepto, pitching for Australia, surrendered a leadoff triple to Haylie McCleney, who was thrown out at home two batters later by shortstop Clare Warwick on an Amanda Chidester fielder's choice.

The teams traded quick innings until the top of the sixth, when Australia loaded the bases on Leigh Godfrey's single and walks from Stacey Porter and Jade Wall.

After pinch-hitter Sayaka Mori reached first on an error by shortstop Janet Leung, Lawrie intentionally walked Nodoka Harada and induced a line out from Yuka Ichiguchi to end Japan's threat and send the game to extra innings.

After a two-run homer in the fifth by Anissa Urtez made it 4–0, Italy relieved Cecchetti on the mound with Alexia Lacatena, who immediately allowed a Brittany Cervantes solo home run.

Escobedo, who surrendered her first and only hit in the sixth to Laura Vigna, completed the game by striking out Giulia Longhi.

In the top of the first, Saki Yamazaki reached safely on an error by Kelsey Stewart and advanced to second on a sacrifice bunt.

Hitomi Kawabata’s single left runners at the corners, and Yamazaki scored an unearned run on a passed ball by Aubree Munro, giving Japan a 1–0 lead.

After a fielder’s choice advanced McCleney, Val Arioto tied the game with a single to left field.

Facing Fujita in the bottom of the seventh, Kelsey Stewart ended the game with a home run to right field.

Lauren Bay-Regula started for Canada, awaiting the results of Mexico–Australia to determine their bronze medal match opponent.

In the top of the second, Jenn Gilbert hit a home run to left-center field—her first tournament hit—to put Canada in front 1–0.

In the third, Joey Lye tripled to the right field corner and tried to score on the next play, but was thrown out at home by Giulia Longhi on a fielder's choice.

In the bottom of the third, Erika Piancastelli singled to center, scoring Laura Vigna for Italy's first and only run of the tournament.

Mexico would load the bases again but Ellen Roberts, relieving Plain, induced a ground out from Nicole Rangel to limit further damage.