^"[MOM735]山梨学院大FW平河悠(3年)_―サッカーが好きすぎて、凄い奴―" [Yamanashi Gakuin University forward Yu Hirakawa (3rd year) -An amazing guy who loves soccer so much-]. ゲキサカ (in Japanese). 24 August 2021. Retrieved 16 April 2024.
^"「今シーズンからFC町田ゼルビアの一員」"2年後"加入内定の山梨学院大MF平河悠が特別指定選手に" [Yamanashi Gakuin University midfielder Yu Hirakawa, who is scheduled to join FC Machida Zelvia from this season, becomes a specially designated player.]. ゲキサカ (in Japanese). 24 September 2021. Retrieved 16 April 2024.