Tsuyoshi Yamaguchi (Karuizawa, JPN) won 7-4 over Takumi Maeda (Kitami, JPN) in the Bronze Medal game at the 2021 Hokkaido Bank Curling Classic in Sapporo, Japan. of the 2021 Hokkaido Bank Curling Classic in Sapporo, Japan; Tsuyoshi Yamaguchi (Karuizawa, JPN) won 7-4 over Takumi Maeda (Kitami, JPN) in the Bronze Medal game at the 2021 Hokkaido Bank Curling Classic in Sapporo, Japan. Yamaguchi lost 10-2 to Yusuke Morozumi (Karuizawa, JPN) in the semifinals to drop into the third place game. of the 2021 Hokkaido Bank Curling Classic in Sapporo, Japan;
 
Yamaguchi finished 2-1 in the 8-team qualifying round. . In their opening game, Yamaguchi lost 8-6 to Yuta Matsumura (Kitami, JPN), then responded with a 5-3 win over Hayato Sato (Sapporo, JPN). Yamaguchi won 7-3 against Kantaro Kawano (Sapporo, JPN) in their final qualifying round match.
 
Yamaguchi ranks th overall on the Year-to-Date rankings with points earned so far this season.