About yakyuu.jp

All underlying data for this site is owned by Nippon Professional Baseball and has been compiled independently by yakyuu.jp. Users are free to use this site and its underlying data for all purposes.

yakyuu.jp was created in 2025 with the goal of fulfilling three important qualities: comprehensiveness, accuracy, and ease-of-use. yakyuu.jp is the only resource that provides integrated player, game, and team pages with advanced statistics, splits, and play-by-play data, as well as automated FIP and wOBA constants, dynamic qualifiers, and regressed park factors. Additionally, yakyuu.jp offers an advanced stat finder that allows users to combine game and event-level filters with customizable statistical thresholds to execute virtually any query.

yakyuu.jp's database is available for download here.