There is a fourth wise monkeys Bashny.Net

The three wise monkeys, symbolizing Japan's Buddhist principle of non-doing of evil, "not to see evil", "hear no evil", "not to speak of evil", you are familiar with. Monkey Mi-zaru, Cica-zaru and Yves-zaru "hide" from evil, closing the mouth, eyes and ears; their images are often found and copied, and parodied. But they also have a fourth friend, whose image is much rarer. Forgotten Sedzaru embodies the principle of "do no evil" and covers the arms and abdomen perineum. As the Japanese say unlucky number 4, the fourth monkey is rarely mentioned.

via factroom.ru