Buffaloes starter Hiroya Miyagi and outfielder Yutaro Sugimoto were the Game 7 heroes for the Pacific League champions.
Yutaro Sugimoto drove in the only run in the third inning, and Orix ended Yakult pitcher Masanori Ishikawa's chance of winning Game 4 in back-to-back years.
Will the superb pitching of Orix be able to contain the explosive hitting of Yakult?
Manager Toru Oniki's club has played 12 games this season, winning 10 times and earning two draws.
