Tsuyoshi Yamaguchi (Nagano, JPN) won 6-5 over Takumi Maeda (Kitami, JPN) in the Final of the Yokohama 2026: Japan Curling Championships, held June 7 - 14 in Yokohama, Japan. To advance to the championship game, Yamaguchi won 6-5 over Kaito Fujii (Karuizawa, JPN) in the semifinals of the Yokohama 2026: Japan Curling Championships in Yokohama, Japan;
 
Yamaguchi are currently . In their opening game, Yamaguchi plays Kohsuke Hirata (Kitami, JPN) on Sunday at 7pm Kaishi Sato (Aomori, JPN) on Monday at 4am Hiroki Yoshioka (Kyoto, JPN) on Tuesday at 7pm Shunta Kobayashi (Sapporo, JPN) on Wednesday at 4am and Fujii at 11:30pm and Fujii at 11:30pm and Fujii at 11:30pm.
 
. Yamaguchi gained 178.6 points improving upon their best 0 events, though dropped 15 spots on the World Ranking Standings into 15thplace overall with 178.600 total points. Yamaguchi ranks 134th overall on the Year-to-Date rankings with 0.000 points earned so far this season.