[7] Ariel Martínez, Yua Tamiya, and Chusei Mannami's offensive contributions helped the Fighters to finish the first half of the season four games over .500 and in the top three.
In the second half, Kotaro Kiyomiya return from injury and former Major League Baseball player Franmil Reyes both played important roles in Nippon-Ham's continued offensive success.
A best-of-three series, all games in the first stage were hosted by Nippon-Ham, the higher seeded team, at their home ballpark, Es Con Field Hokkaido.
Hokkaido native and Olympic gold medalist javelin thrower Haruka Kitaguchi threw out the ceremonial first pitch.
Marines relief pitchers Shota Suzuki and Naoya Masuda pitched in the bottom of the ninth inning and retired all three batters, securing the win for Lotte.
After the walks, Ojima was relieved by Rikuto Yokoyama who then threw a wild pitch, which allowed runners to advance to second and third bases.
[19] Fighters starting pitcher Sachiya Yamasaki then entered the game in his first relief appearance for the team and kept the Marines scoreless in the eighth and ninth innings.
After recording two outs in the bottom half of the tenth inning, pitcher Hirokazu Sawamura allowed a walk and a hit, putting baserunners on first and third base.
In the second inning, after Kitayama allowed a one-out double and a single, Lotte scored a run via a safety squeeze bunt for a hit.
[21] The Fighters responded in the third inning with two outs and runners on second and third when Kotaro Kiyomiya drove in two runs with a single to right field off of Taneichi to tie the game.
The game remained tied until the seventh inning when Taneichi gave up a two-out triple to Nippon-Ham's Tatsuki Mizuno with runners on first and second base to give the Fighters a 4–2 lead.
[20] A best-of-six series, all games in the final stage were hosted by SoftBank, the higher seeded team, at their home ballpark, Mizuho PayPay Dome.
Shinjo gambled that they would defeat the Marines without the help of Itoh so he could instead rest him in preparation of Game 1 of the final stage against the Hawks.
[29] Back from a right ankle sprain a month prior, SoftBank's Kensuke Kondoh doubled in the second inning and further advanced to third on a single.
SoftBank quickly retook the lead in their half of the third inning with a single by Kawase and an RBI double by Hotaka Yamakawa that drove him in.
[30] Arihara continued to pitch into the seventh inning when he gave up a solo home run to Franmil Reyes to bring the Fighters within two.
SoftBank tied the game in the bottom of the inning on Hotaka Yamakawa's two-out single that drove in a runner from second base.
Yamakawa and Kondoh hit two back-to-back, two-out, RBI doubles of off Yamasaki to give the Hawks a quick two-run lead in the first inning.
The Fighters answered in the third inning when Carter allowed Torai Fushimi to hit a leadoff solo home run.