^"高校2年生でトップ昇格。高井幸大はフロンターレの未来を担う" [Promoted to the top in the second year of high school. Kodai Takai will bear the future of Frontale]. note.com (in Japanese). 15 February 2022. Retrieved 18 April 2022.
^"川崎F 17歳の大型CB高井幸大が大勝の広州戦でプロデビュー" [Kawasaki F 17-year-old large CB Kodai Takai makes his professional debut against Guangzhou in a big win]. news.yahoo.co.jp (in Japanese). 18 April 2022. Retrieved 18 April 2022.