Developmental Player System

The {{Nihongo|'''Developmental Player System'''|育成選手制度|Ikusei Sensyu Seido}} is a system that allows players to be held for the purpose of training players separately from the 70 registered players under control of each team created in the fall of {{npby|2005}} at Nippon Professional Baseball (NPB).<ref name="full-count">{{cite web|url=https://full-count.jp/2021/02/01/post1072145/|title=full-count.jp baseball terminology 育成選手制度【意外と知らない野球用語】|language=ja-JP|work=full-count.jp|date=February 8, 2021|accessdate=November 8, 2022}}</ref> It is akin to the practice squads seen in other sports.

==Summary== The system was established in 2005 to create an environment in which amateur players could gain playing experience after company-owned amateur baseball teams were folding following the economic recession of the Lost Decades.<ref>{{cite web|url=https://sports.yahoo.co.jp/column/detail/201512130001-spnavi|title=Sports Navi baseball times 是か非か!? プロ野球「育成選手制度」＝インフォグラフィックで検証|language=ja-JP|work=Yahoo! Japan|date=December 21, 2015|accessdate=November 2, 2022}}</ref> Players who are part of the system are considered "semi-controlled" in that they play for the team they are signed to but they are not a controlled player and thus their team doe not have exclusive rights to them.<ref name="jpbpa1">{{cite web|url=https://jpbpa.net/wp-content/uploads/2021/12/tp2014.pdf|title=Regulations for Nippon Professional Baseball Developmental players|language=ja-JP|work=Japan Professional Baseball Players Association Official site|accessdate=November 8, 2022}}</ref>

The Developmental Player System include players drafted as rookies (e.g. Yusuke Kosai, Michitaka Nishiyama), foreign players signed as developmental players (e.g., Raidel Martínez, Liván Moinelo), players drafted as registered players under control but re-signed with a team as developmental players due to their abilities (e.g., Kenta Kurose), players who became free agents with their former team and signed with another team (e.g., Masaru Nakamura, Kouya Fujii), and players who were removed from the registration of players under control and re-signed as a developmental player as an injury rehabilitation assignment (e.g., Takuya Kuwahara, Hiroya Shimamoto). There is an argument that de-registering players who cannot play due to injury and re-signing them as developmental players will protect their careers; on the other hand, the use of the developmental players system, instead of systems like the Major League Baseball (MLB) Injured list, is criticized as contrary to the original intent of this system to develop and provide opportunities to amateur players.<ref>{{cite web|url=https://column.sp.baseball.findfriends.jp/?pid=column_detail&id=097-20221101-11|title=Weekly baseball HOT TOPIC FAのプロテクト対策? 故障者の育成契約に「疑問の声」が|language=ja-JP|work=Weekly baseball ONLINE|date=November 1, 2022|accessdate=November 8, 2022}}</ref> The oldest player to become a developmental player is Soichi Fujita, who signed in {{npby|2011}} at the age of 39. The longest period as a developmental player was {{ill|Kousuke Naruse|jp|成瀬功亮}}'s eight seasons (2011-{{npby|2018}}) as of the {{npby|2022}} season.

==Regulations for Developmental Players== [[File:Sho Ishikawa Chunichi Dragons 20220730.jpg|right|thumb|Pitcher Shō Ishikawa, wearing the distinctive three-digit uniform number unique to players in the Developmental Player System.]] ;Player Rules * Developmental players are not allowed to participate in official NPB games. However, up to five players per team per game are allowed to play in the Eastern League and Western League, the NPB's minor leagues.<ref name="full-count"/> These minor league farm teams are considered a team's second squad. If a team as a large amount of developmental and minor league players, they may form a third squad and play in games against independent league teams (such as the Shikoku Island League Plus and Baseball Challenge League), corporate amateur teams, or university teams.<ref>{{cite web|url=https://www.giants.jp/G/game/game20220604.html|title=Yomiuri Giants game report 2022年6月4日新潟アルビレックス－読売ジャイアンツ|language=ja-JP|work=Yomiuri Giants Official site|date=June 4, 2022|accessdate=November 8, 2022}}</ref><ref>{{cite web|url=https://www.softbankhawks.co.jp/farm/farm_b/score/2022081001/|title=Fukuoka SoftBank Hawks game report 2022/8/10(水) 3軍試合結果 vs亜細亜大学|language=ja-JP|work=Fukuoka SoftBank Hawks Official site|date=August 10, 2022|accessdate=November 8, 2022}}</ref> The Fukuoka SoftBank Hawks's third squad plays more than 100 games a year.<ref>{{cite web|url=https://hochi.news/articles/20221010-OHT1T51247.html?page=1|title=Sports Hochi baseball news 【ソフトバンク】来季から球界初の4軍制導入 3軍戦に出場できない育成選手の実戦機会確保に期待|language=ja-JP|work=Sports Hochi|date=October 11, 2022|accessdate=November 8, 2022}}</ref> While there is a difference in contract between a registered players under control and a developmental players, unlike the relationship between players Major League Baseball and Minor League Baseball in North America, all NPB are players on the same team regardless of which squad they are on, and use the same practice facility and player dormitory.<ref>{{cite web|url=https://sportiva.shueisha.co.jp/clm/baseball/npb/2016/07/09/post_775/index.php|title=Web Sportiva news こりゃ強いわけだよ。新設されたホークス「二軍施設」がスゴすぎる|language=ja-JP|work=Shueisha|date=July 9, 2016|accessdate=November 8, 2022}}</ref> * A Developmental Player System contract is for a maximum of three years. After this contract expires, the player can become a free agent once and sign with the same team again for a one year extension.<ref name="full-count"/> After the fourth season, and each subsequent season, the NPB will announce the player's free agent status.<ref>{{cite web|url=https://npb.jp/announcement/2022/pndev_released.html|title=Nippon Professional Baseball public notice 公示自由契約選手(育成選手)|language=ja-JP|work=NPB.jp|date=October 31, 2022|accessdate=November 10, 2022}}</ref> This measure is intended to increase the player's chances of signing a registration of players under control contract, and during the free agent period, he can negotiate with other teams. For example, in 2019, Hiroki Hasegawa moved from the Fukuoka Softbank Hawks to the Tokyo Yakult Swallows.<ref>{{cite web|url=https://www.nikkansports.com/baseball/news/201911220000391.html|title=Nikkan Sports baseball news ソフトバンク育成長谷川宙輝がヤクルトへ支配下移籍|language=ja-JP|work=Nikkan Sports|date=November 22, 2019|accessdate=November 8, 2022}}</ref> A one-year contract is also possible for a registered players under control to re-sign as a developmental player after a free agent announcement has been made.<ref name="jpbpa1"/> Players who have not been under contract for three seasons will be placed on the roster of pending developmental players, and other teams will not be able to negotiate with them.<ref>{{cite web|url=https://npb.jp/announcement/2022/pndev_reserved.html|title=Nippon Professional Baseball public notice 公示 2023年度育成選手保留者名簿|language=ja-JP|work=NPB.jp|date=October 31, 2022|accessdate=November 10, 2022}}</ref> * The minimum salary is ¥2.4 million and ¥3 million is paid as a preparation fee when drafted.<ref name="full-count"/> However, since there is no cap on annual salary, some teams sign players at higher salaries, and players who are re-signed as developmental players from a registered players under control often maintain the salary level of a registered players under control.<ref>{{cite web|url=https://www.nishinippon.co.jp/nsp/item/n/829248/|title=Nishinippon Sports baseball news ソフトバンク、育成13位の新潟医療福祉大・佐藤琢磨投手と入団合意|language=ja-JP|work=Nishinippon Shimbun|date=November 9, 2021|access-date=November 10, 2022}}</ref><ref>{{cite web|url=https://hochi.news/articles/20221110-OHT1T51139.html?page=1|title=Sports Hochi baseball news 【中日】来季から育成契約の垣越建伸が推定525万円でサイン中学チームメートの根尾昂の活躍に刺激|language=ja-JP|work=Sports Hochi|date=November 10, 2022|accessdate=November 10, 2022}}</ref> * A developmental player's uniform number will be a three-digit number (e.g. 001, 101, or 201) in the numbers of other players and staff being one- or two-digits.

;Regulations for teams that own developmental players * The deadline for re-signing a developmental player to a registered player under control contract is from the end of the season to July 31st during the following season. However, teams are not permitted to change a player's contract status from a registered under control to developmental during the season.<ref name="full-count"/> * Developmental players can only be owned by teams with at least 65 controlled players on their roster by July 31 each eason, and teams with fewer than 65 controlled players cannot own them. However, if a team reports to the Executive Committee that it has re-signed a developmental player as a controlled player or acquired a new controlled player to bring the number of controlled players to 65 or more, and if this is approved, the team may retain the developmental player.<ref name="jpbpa1"/> There is no limit to the number of developmental players owned and how many a team has depends on the team's policy.<ref>{{cite web|url=https://www.yomiuri.co.jp/local/kyushu/news/20220105-OYTNT50025/|title=Yomiuri Shimbun Baseballnews ホークス四軍構想...早ければ2023年の創設目指す|language=ja-JP|work=Yomiuri Shimbun|date=January 5, 2022|accessdate=November 7, 2022}}</ref> For example, the Yomiuri Giants and Fukuoka SoftBank Hawks often have more than 30 developmental players, enough to field a third-level squad; conversely, the Hanshin Tigers tend to have only a few players.<ref>{{cite web|url=https://npb.jp/bis/eng/teams/rst_g.html|title=Yomiuri Giants 2022 Roster|language=ja-JP|work=NPB.jp|accessdate=November 8, 2022}}</ref><ref>{{cite web|url=https://npb.jp/bis/eng/teams/rst_h.html|title=Fukuoka SoftBank Hawks 2022 Roster|language=ja-JP|work=NPB.jp|accessdate=November 8, 2022}}</ref><ref>{{cite web|url=https://npb.jp/bis/eng/teams/rst_t.html|title=Hanshin Tigers 2022 Roster|language=ja-JP|work=NPB.jp|accessdate=November 8, 2022}}</ref> The Fukuoka SoftBank Hawks selected 14 new developmental players in the 2022 draft to implement a four-team system starting in the 2023 season.<ref>{{cite web|url=https://www.nikkansports.com/baseball/news/202210200001526.html|title=Nikkan Sports baseball news 【ドラフト】育成ドラフトで最多更新の57人指名 4軍設立見据えるソフトバンクが最多14人|language=ja-JP|work=Nikkan Sports|date=October 20, 2022|accessdate=November 4, 2022}}</ref>

;Developmental Players Draft Meeting * If the total number of players selected at the end of the Rookie Player Selection Conference has not reached 120, a Developmental Players Selection Meeting will be held with the participation of the teams that wish to participate.<ref>{{cite web|url=https://draft.npb.jp/draft/2022/schedule.html|title=Nippon Professional Baseball 2022年プロ野球ドラフト会議 supported by リポビタンD 選択手順|language=ja-JP|work=NPB.jp|accessdate=November 9, 2022}}</ref>

;Developmental players trade * Article 11 of the Nippon Professional Baseball Developed Player Regulations states that a trade of a developmental player held by July 31 is allowed, but as of the 2022 season, there are no examples of such a trade.<ref name="jpbpa1"/>

==Outcome== [[File:千賀滉大20120330.jpg|200px|thumb|right|Kodai Senga with the Fukuoka SoftBank Hawks]] The developmental player system, which began in the 2005 season, has been successful in producing major players for each team (e.g. Yoshiki Sunada, Yuji Nishino). The Yomiuri Giants, who have been heavily utilizing this system since the beginning, 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.<ref>{{cite web|url=https://full-count.jp/2017/08/15/post79797/|title=full-count.jp baseball terminology 育成出身が多数活躍、ホークスはなぜ選手が育つのか? 選手の言葉から検証|language=ja-JP|work=full-count.jp|date=August 15, 2017|accessdate=November 8, 2022}}</ref> The Hokkaido Nippon-Ham Fighters, which had been reluctant to acquire developmental players, drafted a player as a developmental player for the first time in the 2018 draft.<ref>{{cite web|url=https://www.nikkansports.com/baseball/news/201810260000027.html|title=Nikkan Sports baseball news 日本ハム初の育成指名吉村GM「環境変化が理由」|language=ja-JP|work=Nikkan Sports|date=October 26, 2018|accessdate=November 10, 2022}}</ref> In the 2022 draft, 51 players will be selected as developmental players, the largest number in history, and the acquisition of developmental players is a growing trend.<ref>{{cite web|url=https://www.nikkansports.com/baseball/news/202210180001289.html|title=Nikkan Sports baseball news 【ドラフト】年々増加する育成選手昨年は史上最多51人、ソフトバンクは14人指名|language=ja-JP|work=Nikkan Sports|date=October 20, 2022|accessdate=November 10, 2022}}</ref>

{| class="wikitable" |+ Holders of league titles and awards from developmental players |- !Player name!!Team!!enrollment!!League Titles and Awards |- !'''Shuta Ishikawa''' |Fukuoka SoftBank Hawks||2013 Draft.||1× Pacific League winning percentage leader (2020) 1× Pacific League the most wins Champion (2020) Pitched a no-hitter on August 18, 2023 |- !'''Takuya Kai''' |Fukuoka SoftBank Hawks||2010 Draft.|||6× Pacific League Golden Glove Award (2017–2022) 3× Pacific League Best Nine Award (2017, 2020. 2022) |- !'''Raidel Martínez''' |Chunichi Dragons||Signed in 2017.||1× Central League Saves leader (2022) |- !'''Tetsuya Matsumoto''' |Yomiuri Giants||2006 Draft.||1× Central League Rookie of the Year (2009) |- !'''Liván Moinelo''' |Fukuoka SoftBank Hawks||Signed in 2017.||1× Pacific League Best Relief Pitcher Award (2020) 1× Pacific League Holds leader (2020) |- !'''Yoshifumi Okada''' |Chiba Lotte Marines||2008 Draft.||2× Pacific League Golden Glove Award (2011, 2012) |- !'''Yariel Rodríguez''' |Chunichi Dragons||Signed in 2020.||1× Central League Best Relief Pitcher Award (2022) 1× Central League Holds leader (2022) |- !'''Kodai Senga''' |Fukuoka SoftBank Hawks||2010 Draft.||2× Pacific League strikeout leader (2019, 2020) 1× Pacific League ERA leader (2020) 1× Pacific League winning percentage leader (2017) 1× Pacific League the most wins champion (2020) 2× Pacific League Best Nine Award (2019, 2020) 2× Pacific League Golden Glove Award (2019, 2020) Pitched a no-hitter on September 6, 2019 |- !'''Ukyo Shuto''' |Fukuoka SoftBank Hawks||2017 Draft.||1×Pacific League Stolen bases Leader (2020) |- !'''Tetsuya Yamaguchi''' |Yomiuri Giants||2005 Draft.||1× Central League Rookie of the Year (2009) 3× Central League Best Relief Pitcher Award (2009, 2012-2013) |}

==Current developmental player rosters == ===Central League === {{hidden begin|title=Current Central League Developmental players rosters {{npby|2024}}|titlestyle=background:#59d986;text-align:center;}} {| class="wikitable" style="width:100%;" !style="width:20%;text-align:center;"|Position!!colspan=2;style="width:70%;text-align:center;"|Players!!style="width:10%;text-align:center;"|source |-style="background-color:#003595;text-align:center;" |colspan="4"|'''{{color|white|Chunichi Dragons}}''' |- !style="background-color:#003570;text-align:center;"|{{color|white|Pitchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|201|Ryushin Takeuchi}} {{NPBplayer|202|Frank Álvarez}} {{NPBplayer|204|Tubasa Kato}} {{NPBplayer|205|Kenshin Kakigoshi}} {{NPBplayer|208|Sho Ishikawa}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|210|Toshiya Okada}} {{NPBplayer|212|Tensho Nonaka}} {{NPBplayer|213|Akio Moriyama}} {{NPBplayer|214|Ren Kondoh}} {{NPBplayer|216|Towa Kikuta}} |rowspan="4"|<ref>{{cite web|url=https://npb.jp/announcement/2024/registereddev_d.html|title=Nippon Professional Baseball 2024年度育成選手登録中日ドラゴンズ育成選手一覧|language=ja-JP|website=NPB.jp|date=October 9, 2024|accessdate=October 21, 2024}}</ref> |- !style="background-color:#003570;text-align:center;"|{{color|white|Catchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|215|Toki Hiwatari}} |style="vertical-align:top;border-left:none;"| |- !style="background-color:#003570;text-align:center;"|{{color|white|Infielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|207|Mao Hoshino}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|218|Rii Kawakami}} |- !style="background-color:#003570;text-align:center;"|{{color|white|Outfielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|211|Yuma Fukumoto}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|220|Carlos Monier}} |-style="background-color:#000000;text-align:center;" |colspan="4"|'''{{color|white|Hanshin Tigers}}''' |- !style="background-color:#FFE100;text-align:center;"|{{color|black|Pitchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|122|Ippei Ogawa}} {{NPBplayer|123|Kai Matsubara}} {{NPBplayer|125|Ryo Itoh}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|131|Jose Betances}} {{NPBplayer|132|Anthony Martinez}} |rowspan="2"|<ref>{{cite web|url=https://npb.jp/announcement/2024/registereddev_t.html|title=Nippon Professional Baseball 2024年度育成選手登録阪神タイガース育成選手一覧|language=ja-JP|website=NPB.jp|date=October 9, 2024|accessdate=October 4, 2024}}</ref> |- !style="background-color:#FFE100;text-align:center;"|{{color|black|Outfielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|126|Kein Fukushima}} |style="vertical-align:top;border-left:none;"| |-style="background-color:#E50012;text-align:center;" |colspan="4"|'''{{color|white|Hiroshima Toyo Carp}}''' |- !style="background-color:#BC0011;text-align:center;"|{{color|white|Pitchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|120|Takeru Sugita}} {{NPBplayer|122|Rei Sakata}} {{NPBplayer|125|Taiga Tsuji}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|126|So Shinya}} {{NPBplayer|128|Mirai Sugihara}} {{NPBplayer|129|Raisei Nakamura}} |rowspan="3"|<ref>{{cite web|url=https://npb.jp/announcement/2024/registereddev_c.html|title=Nippon Professional Baseball 2024年度育成選手登録広島東洋カープ育成選手一覧|language=ja-JP|website=NPB.jp|date=October 9, 2024|accessdate=October 21, 2024}}</ref> |- !style="background-color:#BC0011;text-align:center;"|{{color|white|Infielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|127|Seita Maekawa}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|130|Moises Ramírez}} |- !style="background-color:#BC0011;text-align:center;"|{{color|white|Outfielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|121|Norihiko Nabara}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|131|Nelson Robert}} |-style="background-color:#073180;text-align:center;" |colspan="4"|'''{{color|white|Tokyo Yakult Swallows}}''' |- !style="background-color:#92c427;text-align:center;"|{{color|#073180|Pitchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|012|Hiroki Kondo}} {{NPBplayer|013|Kota Katekaru}} {{NPBplayer|015|Shohei Numata}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|016|Yusei Nishihama}} {{NPBplayer|017|Shosei}} {{NPBplayer|019|Shinnosuke Shimo}} |rowspan="3"|<ref>{{cite web|url=https://npb.jp/announcement/2024/registereddev_s.html|title=Nippon Professional Baseball 2024年度育成選手登録東京ヤクルトスワローズ育成選手一覧|language=ja-JP|website=NPB.jp|date=October 9, 2024|accessdate=October 21, 2024}}</ref> |- !style="background-color:#92c427;text-align:center;"|{{color|#073180|Catchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|025|Felipe Kisu}} |style="vertical-align:top;border-left:none;"| |- !style="background-color:#92c427;text-align:center;"|{{color|#073180|Infielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|026|Sota Takano}} |style="vertical-align:top;border-left:none;"| |-style="background-color:#0052CD;text-align:center;" |colspan="4"|'''{{color|white|Yokohama DeNA BayStars}}''' |- !style="background-color:#0093C9;text-align:center;"|{{color|white|Pitchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|101|Haruto Kusano}} {{NPBplayer|102|Manato Shimizu}} {{NPBplayer|105|Wilny Moron}} {{NPBplayer|106|Aki Watanabe}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|107|Hansel Marcelino}} {{NPBplayer|108|Ryuto Konno}} {{NPBplayer|110|Alexander Martínez}} {{NPBplayer|122|Haruto Shoji}} |rowspan="4"|<ref>{{cite web|url=https://npb.jp/announcement/2024/registereddev_db.html|title=Nippon Professional Baseball 2024年度育成選手登録横浜DeNAベイスターズ育成選手一覧|language=ja-JP|website=NPB.jp|date=October 9, 2024|accessdate=October 21, 2024}}</ref> |- !style="background-color:#0093C9;text-align:center;"|{{color|white|Catchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|116|Ryuhei Kuki}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|130|Taiga Kondoh}} |- !style="background-color:#0093C9;text-align:center;"|{{color|white|Infielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|100|Ren}} {{NPBplayer|125|So Ogasawara}} {{NPBplayer|133|Ryunosuke Aibara}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|144|Daichi Kobukata}} {{NPBplayer|193|Ikumi Takamizawa}} |- !style="background-color:#0093C9;text-align:center;"|{{color|white|Outfielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|103|Nagi Murakawa}} |style="vertical-align:top;border-left:none;"| |-style="background-color:#FF7820;text-align:center;" |colspan="4"|'''{{color|white|Yomiuri Giants}}''' |- !style="background-color:#000000;text-align:center;"|{{color|#FF7820|Pitchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|011|Naoki Kasashima}} {{NPBplayer|012|Katsunari Miura}} {{NPBplayer|015|Haruto Kawasaki}} {{NPBplayer|016|Takahiro Chiba}} {{NPBplayer|018|Motoya Kinoshita}} {{NPBplayer|019|Junki Sonoda}} {{NPBplayer|020|Natsuki Toda}} {{NPBplayer|021|Kenta Onuma}} {{NPBplayer|023|Tomoki Tamura}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|026|Yusefu Yoshimura}} {{NPBplayer|028|Ryu Tomida}} {{NPBplayer|030|Yusuke Yamasaki}} {{NPBplayer|034|Tessei Morimoto}} {{NPBplayer|035|Elvis Luciano}} {{NPBplayer|041|Huang Chin-hao}} {{NPBplayer|047|Eiji Kamouchi}} {{NPBplayer|063|Yuki Hanada}} |rowspan="4"|<ref>{{cite web|url=https://npb.jp/announcement/2024/registereddev_g.html|title=Nippon Professional Baseball 2024年度育成選手登録読売ジャイアンツ育成選手一覧|language=ja-JP|website=NPB.jp|date=October 9, 2024|accessdate=October 21, 2024}}</ref> |- !style="background-color:#000000;text-align:center;"|{{color|#FF7820|Catchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|006|Hayato Sakamoto}} {{NPBplayer|010|Ryoya Ohtsu}} {{NPBplayer|022|Keita Kameda}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|024|Kenki Maeda}} {{NPBplayer|069|Tetsu Hagiwara}} |- !style="background-color:#000000;text-align:center;"|{{color|#FF7820|Infielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|001|Ren Kato}} {{NPBplayer|004|Gen Murayama}} {{NPBplayer|005|Yuya Tanoue}} {{NPBplayer|007|Kisara Utsunomiya}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|008|Hakuto Aizawa}} {{NPBplayer|025|Hiroto Okamoto}} {{NPBplayer|027|Rio Kitamura}} |- !style="background-color:#000000;text-align:center;"|{{color|#FF7820|Outfielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|003|Yamato Suzuki}} {{NPBplayer|009|Misaki Sasahara}} {{NPBplayer|013|Julian Tima}} {{NPBplayer|031|Rui Mitsuka}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|033|Kota Hirayama}} {{NPBplayer|037|Marek Chlup}} {{NPBplayer|044|Gen Ohshiro}} {{NPBplayer|051|Hidetora Funakoshi}} |} {{hidden end}}

===Pacific League === {{hidden begin|title='''Current Pacific League Developmental players rosters {{npby|2024}}'''|titlestyle=background:#58ceff;text-align:center;}} {| class="wikitable" style="width:100%;" !style="width:20%;text-align:center;"|Position!!colspan=2;style="width:70%;text-align:center;"|Players!!style="width:10%;text-align:center;"|source |-style="background-color:#000000;text-align:center;" |colspan="4"|'''{{color|white|Chiba Lotte Marines}}''' |- !style="background-color:#CCCCCC;text-align:center;"|{{color|black|Pitchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|120|Fuki Tanaka}} {{NPBplayer|121|Seiya Dohi}} {{NPBplayer|124|Takuro Furuya}} {{NPBplayer|125|Kirato Nagashimada}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|127|Yuto Yoshikawa}} {{NPBplayer|128|Kaiki Shirahama}} {{NPBplayer|133|Ryota Takeuchi}} |rowspan="4"|<ref>{{cite web|url=https://npb.jp/announcement/2024/registereddev_m.html|title=Nippon Professional Baseball 2024年度育成選手登録千葉ロッテマリーンズ育成選手一覧|language=ja-JP|website=NPB.jp|date=October 9, 2024|accessdate=October 21, 2024}}</ref> |- !style="background-color:#CCCCCC;text-align:center;"|{{color|black|Catchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|126|Ryosuke Murayama}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|137|Konoshin Tomiyama}} |- !style="background-color:#CCCCCC;text-align:center;"|{{color|black|Infielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|129|Rui Katsumata}} {{NPBplayer|130|Kaisei Kurokawa}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|134|Shinya Matsuishi}} |- !style="background-color:#CCCCCC;text-align:center;"|{{color|black|Outfielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|135|Hikaru Kohno}} {{NPBplayer|136|Kazuki Fujita}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|138|Andy Martin}} |-style="background-color:#FBC700;text-align:center;" |colspan="4"|'''{{color|black|Fukuoka SoftBank Hawks}}''' |- !style="background-color:#000000;text-align:center;"|{{color|white|Pitchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|120|Hiroki Sato}} {{NPBplayer|125|Yuri Furukawa}} {{NPBplayer|126|Yuwa Miyasato}} {{NPBplayer|133|Kotaro Hoshino}} {{NPBplayer|134|Shinno Ohshiro}} {{NPBplayer|135|Alexander Armenta}} {{NPBplayer|136|Fuga Otake}} {{NPBplayer|139|Sanshiro Izaki}} {{NPBplayer|141|Mailon Felix}} {{NPBplayer|142|Haruto Fujiwara}} {{NPBplayer|143|Shun Murakami}} {{NPBplayer|145|Reiri Tanaka}} {{NPBplayer|146|Jumpei Fujita}} {{NPBplayer|147|Koki Kato}} {{NPBplayer|148|Takuma Yamasaki}} {{NPBplayer|152|Masaki Takimoto}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|154|Takuma Sato}} {{NPBplayer|156|Luis Rodríguez}} {{NPBplayer|157|Jui Kobayashi}} {{NPBplayer|158|Ren Akaba}} {{NPBplayer|160|Keishin Nagamizu}} {{NPBplayer|161|Kaito Uchino}} {{NPBplayer|162|Junpei Okaue}} {{NPBplayer|163|Akito Sasaki}} {{NPBplayer|164|Sota Mizuguchi}} {{NPBplayer|165|Hayato Miyazaki}} {{NPBplayer|169|Yusei Tobita}} {{NPBplayer|172|Yuki Watanabe}} {{NPBplayer|174|Takuya Kuwahara}} {{NPBplayer|176|Dario Sarduy}} {{NPBplayer|177|Hiromasa Saito}} |rowspan="4"|<ref>{{cite web|url=https://npb.jp/announcement/2024/registereddev_h.html|title=Nippon Professional Baseball 2024年度育成選手登録福岡ソフトバンクホークス育成選手一覧|language=ja-JP|website=NPB.jp|date=October 9, 2024|accessdate=October 21, 2024}}</ref> |- !style="background-color:#000000;text-align:center;"|{{color|white|Catchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|151|Sora Katoh}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|171|Ryota Morishima}} |- !style="background-color:#000000;text-align:center;"|{{color|white|Infielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|122|Keio Fujino}} {{NPBplayer|124|Shuji Kuwahara}} {{NPBplayer|128|Daisuke Itoh}} {{NPBplayer|129|Kyoshiro Sakura}} {{NPBplayer|130|Haruki Katsuren}} {{NPBplayer|131|Koki Nakazawa}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|149|Takuto Sakuma}} {{NPBplayer|153|Yoshiki Mishiro}} {{NPBplayer|159|Kyogo Yamashita}} {{NPBplayer|170|Ayuma Nishio}} {{NPBplayer|175|David Almonte}} |- !style="background-color:#000000;text-align:center;"|{{color|white|Outfielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|123|Shuya Ohizumi}} {{NPBplayer|144|Marco Simon}} {{NPBplayer|150|Keita Yamamoto}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|166|Kaito Shigematsu}} {{NPBplayer|168|Kota Satoh}} {{NPBplayer|173|José Osuna}} |-style="background-color:#00508F;text-align:center;" |colspan="4"|'''{{color|white|Hokkaido Nippon-Ham Fighters}}''' |- !style="background-color:#C8B88C;text-align:center;"|{{color|black|Pitchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|113|Yamato Katoh}} {{NPBplayer|114|Ryodai Matsumoto}} {{NPBplayer|115|Shinji Saito}} {{NPBplayer|126|Terukazu Nakayama}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|128|Kodai Yamamoto}} {{NPBplayer|137|Ren Kakigi}} {{NPBplayer|168|Koki Matsuoka}} {{NPBplayer|196|Sun Yi-Lei}} |rowspan="3"|<ref>{{cite web|url=https://npb.jp/announcement/2024/registereddev_f.html|title=Nippon Professional Baseball 2024年度育成選手登録北海道日本ハムファイターズ育成選手一覧|language=ja-JP|website=NPB.jp|date=October 9, 2024|accessdate=October 21, 2024}}</ref> |- !style="background-color:#C8B88C;text-align:center;"|{{color|black|Infielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|111|Taiki Hamada}} |style="vertical-align:top;border-left:none;"| |- !style="background-color:#C8B88C;text-align:center;"|{{color|black|Outfielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|124|Kazuhiro Abe}} {{NPBplayer|125|Taisei Fujita}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|127|Ataru Yamaguchi}} |-style="background-color:#202030;text-align:center;" |colspan="4"|''' {{color|white|Orix Buffaloes}}''' |- !style="background-color:#9E751E;text-align:center;"|{{color|white|Pitchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|003|Yuito Nakata}} {{NPBplayer|032|Kaito Iriyama}} {{NPBplayer|041|Hiroto Suga}} {{NPBplayer|042|Kaito Ohe}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|043|Riku Miyaguni}} {{NPBplayer|044|Taketo Ashida}} {{NPBplayer|130|Taiki Ono}} |rowspan="4"|<ref>{{cite web|url=https://npb.jp/announcement/2024/registereddev_b.html|title=Nippon Professional Baseball 2024年度育成選手登録オリックス・バファローズ育成選手一覧|language=ja-JP|website=NPB.jp|date=October 9, 2024|accessdate=October 21, 2024}}</ref> |- !style="background-color:#9E751E;text-align:center;"|{{color|white|Catchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|034|Kyoichiro Murakami}} |style="vertical-align:top;border-left:none;"| |- !style="background-color:#9E751E;text-align:center;"|{{color|white|Infielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|045|Sota Kawano}} {{NPBplayer|124|Kyohei Ueno}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|126|Kazuya Katsuki}} |- !style="background-color:#9E751E;text-align:center;"|{{color|white|Outfielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|004|Yamato Hirano}} {{NPBplayer|020|Takayuki Yamanaka}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|123|Motohide Kinoshita}} |-style="background-color:#00214B;text-align:center;" |colspan="4"|'''{{color|white|Saitama Seibu Lions}}''' |- !style="background-color:#0065b3;text-align:center;"|{{color|white|Pitchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|112|Kaito Awatsu}} {{NPBplayer|113|Sho Itoh}} {{NPBplayer|114|Towa Uema}} {{NPBplayer|115|Takeru Sasaki}} {{NPBplayer|116|Víctor López}} {{NPBplayer|120|Hiroki Inoue}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|121|Daiki Miura}} {{NPBplayer|125|Sinclair}}{{NPBplayer|127|Ryosuke Moriwaki}} {{NPBplayer|129|Masahiro Kiwashimo}} {{NPBplayer|131|Shota Kise}} {{NPBplayer|136|Yuto Akagami}} |rowspan="4"|<ref>{{cite web|url=https://npb.jp/announcement/2024/registereddev_l.html|title=Nippon Professional Baseball 2024年度育成選手登録埼玉西武ライオンズ育成選手一覧|language=ja-JP|website=NPB.jp|date=October 9, 2024|accessdate=October 21, 2024}}</ref> |- !style="background-color:#0065b3;text-align:center;"|{{color|white|Catchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|122|Ryosuke Koresawa}} |style="vertical-align:top;border-left:none;"| |- !style="background-color:#0065b3;text-align:center;"|{{color|white|Infielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|118|Kazuki Nomura}} {{NPBplayer|126|Asahi Taniguchi}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|130|Koji Kaneko}} {{NPBplayer|134|Ryota Kawano}} |- !style="background-color:#0065b3;text-align:center;"|{{color|white|Outfielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|119|Montell}} {{NPBplayer|123|Joseph}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|135|Yuta Nakamigawa}} |-style="background-color:#870010;text-align:center;" |colspan="4"|'''{{color|white|Tohoku Rakuten Golden Eagles}}''' |- !style="background-color:#FFCC00;text-align:center;"|{{color|black|Pitchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|017|Wang Yan-cheng}} {{NPBplayer|062|Naoto Nishiguchi}} {{NPBplayer|130|Kosei Koga}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|138|Shinri Komine}} {{NPBplayer|155|Akihiro Takeshita}} |rowspan="4"|<ref>{{cite web|url=https://npb.jp/announcement/2024/registereddev_e.html|title=Nippon Professional Baseball 2024年度育成選手登録東北楽天ゴールデンイーグルス育成選手一覧|language=ja-JP|website=NPB.jp|date=October 9, 2024|accessdate=October 21, 2024}}</ref> |- !style="background-color:#FFCC00;text-align:center;"|{{color|black|Catchers}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|022|Kei Mizukami}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|137|Yuto Egawa}} |- !style="background-color:#FFCC00;text-align:center;"|{{color|black|Infielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|131|Sotaro Nagata}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|141|Kiyoharu Sawano}} |- !style="background-color:#FFCC00;text-align:center;"|{{color|black|Outfielders}} |style="vertical-align:top;border-right:none;"|{{NPBplayer|142|Ozora Yanagisawa}} |style="vertical-align:top;border-left:none;"|{{NPBplayer|144|Sho Okawara}} |} {{hidden end}}

==References== {{reflist}}

==External links== * [https://jpbpa.net/contract/ Nippon Professional Baseball Agreement・Unified contract documents] - Japan Professional Baseball Players Association Official site {{in lang|ja}} * [https://npb.jp/announcement/2023/ Nippon Professional Baseball public notice 2023 - NPB.jp] {{in lang|ja}} * [https://npb.jp/eng/teams/ Teams index - NPB.jp]

Category:Nippon Professional Baseball Category:Nippon Professional Baseball players Category:Baseball in Japan Category:2005 establishments in Japan