On the 30th, Nippon-Ham announced that they had registered both Seimiya Kotaro pitcher (26) and Hiroki Tsuneya infielder (22), who had both had developmental contracts. number was set for '94' for Kiyomiya Tora and '95' for Tsunetani.

Kiyomiya Tora has appeared in 11 games in the minor leagues this season, with a record of 1 win, 0 losses, 1 hold, and ERA 5.14. He commented, "I will continue to work hard so that I can show my gratitude to everyone who has supported me through pitch, and above all, so that I can become a player who can contribute to the team winning the championship."

Rookie Tsuneya has played in 40 games in the minor leagues so far, batting .231 with 3 Home Run and 20 RBI. "I'm really happy that I've achieved my goal of being registered as a regular player since joining the team. Being registered as a regular player isn't the goal, but rather I feel like I've finally reached the starting line. I want to prepare thoroughly so that I can perform well as soon as possible and contribute to the team winning the championship," he said enthusiastically.

◆Kotaro Seimiya: Born May 26, 2000, in Yachiyo City, Chiba Prefecture. Age 26. Joined Rakuten Eagles in 2018 as the first pick in the developmental draft from Yachiyo Shoin High School. Overcame Tommy John surgery in 2021 and recorded a top speed of 161 km/h, and was registered as a regular player in April 2024. However, he only appeared in 3 games in the first team and was released at the end of that year. After a tryout, he signed a developmental contract with Nippon-Ham. 190 cm, 104 kg. Right-handed pitcher, left-handed batter.

◆Hiroki Tsuneya, born January 18, 2004. Hometown: Ebetsu City, Hokkaido. Age 22. After attending Sapporo Seishu High School and Hokkai Gakuen University, he joined the Nippon-Ham as the first overall pick in the 2025 Development Draft.He is a infielder capable of hitting long balls to all fields, and during his college days, he utilized his strong throwing arm to serve as a pitcher. His older brother, Motoki, works as a training assistant at Shimokawabe Farm in Hidaka, Hokkaido, where he is also in charge of the farm-bred G1 winner Soul Rush. He is 180 cm tall and weighs 85 kg. He bats and throws right-handed.