Nippon Professional Baseball Agreement (日本プロフェッショナル野球協約, Nippon Professional Yakyū Kyoyaku) is an agreement that the Nippon Professional Baseball Organization stipulates all NPB regulations, such as player contracts, draft and commissioner authority.
[1] Nippon Professional Baseball Agreement came into effect on June 21, 1951 and is being revised from time to time.
[1] This Agreement consists of this article and the unified contract document format[2] used by all players when making a contract.
All regulations such as draft meetings, player contracts, commissioner authority, etc.
are stipulated, and NPB is operated based on this agreement, which is also called the "Constitution of Nippon Professional Baseball".