Ushiku sports park, Sports park in Ushiku, Japan

Ushiku Athletic Park is a sports facility in Ushiku with multiple areas for different activities and competitions. The grounds include two multipurpose arenas, a gymnasium, baseball fields, tennis courts, and an indoor swimming pool available throughout the year.

The park's baseball ground has hosted official Nippon Professional Baseball farm-league games: Hokkaido Nippon-Ham Fighters versus Chiba Lotte Marines on 2 September 2017 (15-8, 2,206 spectators), versus Tohoku Rakuten Golden Eagles on 1 September 2018 (4-5, 2,431), and versus Saitama Seibu Lions on 17 September 2022 (1-3, 1,966). Since 2019 the independent Baseball Challenge League's Ibaraki Astro Planets have also played official games here.

Since 2019 the park has hosted official Baseball Challenge League games of the Ibaraki Astro Planets, an independent team. The park's name, Ushiku Undo Koen, simply combines the city name with the Japanese term for an athletics park. Visitors can watch these league fixtures at the baseball ground.

The park is about 1.5 km southeast of Hitachino-Ushiku Station on the JR Joban Line. Kanto Railway community buses on the Undo Koen route stop at Undo Koen and Taiikukan-mae. Facilities are open 9:00 to 21:00, with the training room until 22:00; closed the second and fourth Mondays and from 28 December to 4 January.

The park's baseball ground has hosted official Nippon Professional Baseball farm-league games, including a Hokkaido Nippon-Ham Fighters vs Chiba Lotte Marines match on 2 September 2017 played before 2,206 spectators. Since 2019 the independent Ibaraki Astro Planets of the Baseball Challenge League have also used it for official games.