Momotaro

Also known as Peach Boy, he is a popular figure in Japanese folklore.
Found floating down a river in a giant peach by an old couple, Momotaro becomes the elderly couple's son. Years later, he sets off to demon island which terrorizes the villages around it. On the way there he befriends a monkey, a dog, and a pheasant, who aid him and eventually helps him defeat all the demons.

Three Wise Monkeys

The saying goes "see no evil, hear no evil, speak no evil."
Often depicted with monkeys, they are...

Mizaru, who covers it's eyes.
Kikazaru, who covers it's ears.
and Iwazaru, who covers it's mouth.

What's not commonly known is that there is sometimes a 4th monkey named Shizaru, embodying the saying "do no evil" and is shown crossing his arms, or... holding it's crotch, it looks like.