Seiya Maikuma (毎熊 晟矢, Maikuma Seiya, born 16 October 1997) is a Japanese professional footballer who plays as a right-back for Eredivisie club AZ and the Japan national team.

[4] On 9 December 2022, Maikuma, along with Satoki Uejo and Tokuma Suzuki, had their contracts renewed.

[7] On 21 June 2024, Maikuma joined Eredivisie side AZ on a four-year deal.

[8] In August 2023, Maikuma received his first call-up to the Japan senior national team by head coach Hajime Moriyasu, for two friendly matches against Germany and Turkey.

[11] On 1 January 2024, Maikuma was named in the Japan squad for the 2023 AFC Asian Cup.