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Munehisa Iwai is the owner of the airsoft shop, "Untouchable" in Shibuya. When the protagonist asks him about the "real" firearms, Iwai shows interest in his motive, says he dislikes the police and offers to supply the real stuff in exchange for the protagonist assisting him in shady activities. Building up Confidant with him makes him offer a discount for the protagonist.[source]http://megamitensei.wikia.com/wiki/Munehisa_Iwai[/source]