It says in 'Imagawa-ozoshi' that, 'for marikawa (ball leather), a big doe with 2 colors in their fur during spring gives a white and high-quality leather and that pressing fingernails on the leather will cause wrinkles.'
「今川大草紙」によれば、「鞠皮は、春二毛の大女鹿の中にも、皮の色白で、爪にて押せば、しわのよる皮を上品とする也」という。