These are school uniform concepts for the imaginary high schools behind the teams in Nijisanji Koshien 2023.
Covas Imperial High SchoolHelesta Royal High SchoolSt. Azarashi Gakuin High SchoolNijisanji High SchoolYusha Ikusei High SchoolKoku GakuinYokosuka Ryusei High SchoolMameneko Technical High SchoolKaitou Gakuen High SchoolVirtual Kansai High School
