The Pacific League, led by the Fukuoka Softbank Hawks, got the best of the Central League on the field, but couldn't keep pace in the stands.
The PL saw a 6.7 percent decline in average attendance during interleague play this season compared with last year's figures.
The interleague champion Hawks were the only PL team to see an increase, moving up 0.8 percent. The Chiba Lotte Marines turned in the biggest dropoff, drawing 19.6 percent fewer fans per home game. The Orix Buffaloes also saw a double-digit decline (12.3 percent) despite an impressive 15-7-2 record against CL teams this season.