Although it might look like one, the "henohenomoheji" is not a hayakuchi kotoba
What is a henohenomoheji?
look at the picture below, the face to the left is the henohenomoheji!
(by the way,for naruto fans, kakashi means FAZZA3A)
Can you see the face?
Can you guess why its name is henohenomoheji??
Look closely at the face, you can see it is composed from HIRAGANA ^^
The eyes are NO , the eyebrows and mouth are HE, the nose is MO the whole face is JI(notice the two dots that makes the shi into a JI).
So you name it like this : HE NO HE NO MO HE JI!!
Omoshiroi desu ne!