Iwazaru is mute, but he overcomes his disabilities by co-operating with the other wise monkeys and communicating via sign language with them.
Dialogue
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Trivia
Mizaru (見ざる), Kikazaru (聞かざる), Iwazaru (言わざる), can be translated from Japanese as "Don't see, Don't hear, Don't speak", where the word "-zaru" (猿) can also be translated to monkey (猿). The three can also be translated as "See no evil, Hear no evil, Speak no evil." The maxim, Three wise monkeys (san'en, 三猿), is Japanese in origin.