Developmental player system (Nippon Professional Baseball)

[1] This system was established in 2005 to create an environment in which amateur players can newly play in the situation where company-owned amateur baseball teams were being abolished one after another.

[2] A Developmental player (育成選手, Ikusei Sensyu) is a player who aims to improve baseball skill training and manner training in order to aim for registered players under control, that is eligible to participate in NPB's first league official game (Central League, Pacific League, Interleague play (NPB)).

), players who became free agents with their former team and signed with another team (e.g., Masaru Nakamura, Kouya Fujii - Re-signed as a registered player under control.

(e.g. Yoshiki Sunada, Yuji Nishino) The Yomiuri Giants, who have been working on this system since early on, have signed more than 50 developmental players as their registered players under control as of the 2022 season.

The Fukuoka Softbank Hawks have also signed 40 developmental players as their registered players under control, and have produced players like Kodai Senga and Takuya Kai who have won league titles and awards and represented Japanese baseball on the national baseball team.