You can find each of my Nippon Professional Baseball (NPB) ballpark visits here. My visits to Japanese ballparks began in 2018. For the sake of consistency, the list uses the ballpark’s name at the time of my visit.
Central League Ballparks
Tokyo Yakult Swallows (Meiji Jingu Stadium; Shinjuku, Tokyo)
Yomiuri Giants (Tokyo Dome; Bunkyō, Tokyo)
Pacific League Ballparks
Saitama Seibu Lions (MetLife Dome; Tokorozawa, Saitama)