◆Nippon Life Interleague Series 2026 Seibu Lions 13-4 DeNA (29th, Belluna Dome)

Seibu Lions won the first game of their three-game series against DeNA with a powerful offensive performance, achieving their first-ever three-game winning streak to start the interleague series. With every player in the starting lineup hit, they became the fastest team in both leagues to reach 30 wins of the season, and their first time having a winning record of 10 games above .500 since August 30, 2022.

In the second inning, with one out and runners on first and third, Genda hit a timely doble the right field line to score the first run. With one out and runners on second and third, Nishikawa hit a ground ball to second base, allowing Watanabe, the runner on third, to score the second run.

In the third inning with no outs and a runner on first, just after the score was tied, Kuwahara hit a timely triple that dropped just below the right field line against his former team, securing the go-ahead score. After one out and a runner on third, he advanced home as a runner on Hasegawa's grounder to shortstop. Although he was caught between three home runs, he held on until Hasegawa reached third base and then connected with a timely hit by Yu Koga. As a result, the team scored 4 runs in this inning.

In the fourth inning, Canario hit his sixth solo home run of the season. In the seventh inning, with one out, Nevin, who was celebrating his 29th birthday that day, hit his ninth solo home run to left-center field. The team then went on a five-hit, two-Walk offensive, and scored five runs in quick succession.

Starter Mitsunari Takahashi pitcher pitched 8 hit 4 runs during the 8th inning, earning his 6th win with a passionate 120-pitch pitch. In the first inning, all three players retired in order. His streak of consecutive losses in interleague play ended at 12. In the third inning, Watarai gave up a Home Run and gave up two runs, but continued to runner and held firm, preventing any runs.