Tori Koana (Yamanashi, JPN) qualified for the 2019 Colonial Square Ladies Classic playoffs, dropping their quarterfinals match 3-2 against Rachel Homan (Ottawa, ON).
 
Koana finished 4-2 in the 24-team qualifying round. . In their opening game, Koana defeated Ashley Thevenot (Saskatoon, SK) 6-2, then won 10-3 against Laura Walker (Edmonton, AB). Koana went on to lose 9-3 against Homan. Koana responded with a 8-7 win over Jodi Vaughan (Calgary, AB). Koana went on to lose 8-6 against Jennifer Jones (Winnipeg, MB). Koana responded with a 7-3 win over Penny Barker (Moose Jaw, SK) in their final qualifying round match.
 
Koana earned 21.098 world rankings points for their Top 5 finish in the Colonial Square Ladies Classic, remaining in 35th place overall on the World Ranking Standings with a net gain of 6.149 after improving upon their best so far this season. Koana ranks 17th overall on the Year-to-Date rankings with 47.729 points earned so far this season.