Pacific League Teams are Stronger than Central League Teams

In Japanese baseball, there are six teams in both the Pacific League and the Central League. In the past, there were no interleague games, but 20 years ago, interleague games started.  In MLB, it's not decided the time when interleague games are played, but in Japan, they're played in June.  Yesterday, interleague games started. My favorite team, the Hanshin Tigers, won yesterday, but they lost today. I checked which teams won other games and found that all the teams in the Pacific League won.  In fact, it's said that the Pacific League teams are stronger than the Central League teams. The Tigers are currently in first place, so I hope they will be able to win some interleague games and stay in first place.