Oto (the Kyogen woman mask): used for young pretty women in Kyogen. Overly plump and dimpled, she is a lower-class parody of the refined Ko-Omote mask in Noh. See below for two more versions.

A Muromachi period Oto mask.

This mask is appropriately known as "Shitakirihime" -- "The Young Woman with Her Tongue Sticking Out"