The following anecdote is included in Volume 28 of Konjaku Monogatari (Shu) (The Tale of Times Now Past): In around 1040, he participated in an event of Kusaawase (competing how the grass picked up was superior) held at Ukon no Baba (a riding ground) in Kitano.
今昔物語集巻二十八に長久初年頃に北野の右近馬場で行われた種合(くさあわせ,草合)に参加した逸話がある。