Thanks everyone. I will try to update/finish it next year. I'm also interested in seeing some of the little used stadiums, it looks like the NPB teams play in other stadiums once or twice a year so that fans in smaller cities can easily see their favorite teams.
Here are some of the alternate places where games were scheduled in 2016:
Kitakyushu
Shizuoka
Asahikawa
Niigata
Yamagata
Obihiro
Omiya
Kurashiki
Matsuyama
Koriyama
Miyoshi
Akita
Nagano
Fukui
Toyama
Kure
Kumamoto
Kagoshima
Hamamatsu
Toyohashi
Kanazawa
Gifu