Seina Nakajima (Nagano, JPN) won 5-3 over Sae Yamamoto (Karuizawa, 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; Seina Nakajima (Nagano, JPN) won 5-3 over Sae Yamamoto (Karuizawa, JPN) in the Bronze Medal game at the 2021 Hokkaido Bank Curling Classic in Sapporo, Japan. Nakajima lost 6-4 to Tori Koana (Yamanashi, JPN) in the semifinals to drop into the third place game.
 
Nakajima finished 2-1 in the 8-team qualifying round. . In their opening game, Nakajima defeated Miku Nihira (Sapporo, JPN) 6-4, then went on to lose 5-3 against Satsuki Fujisawa (Kitami, JPN). Nakajima responded with a 7-2 win over Asuka Kanai (Karuizawa, JPN) in their final qualifying round match.
 
Nakajima ranks 245th overall on the Year-to-Date rankings with 0.000 points earned so far this season.