The most well-known cultural behavior of Japanese macaques is the “potato washing” the macaques on Kojima Island. In 1954, researchers observed that a four-year-old female washed a sweet potato covered with sand in seawater before eating it. Furthermore, the female also demonstrated a form of “gold panning,” throwing oat grains mixed with sand into the water, and eating the oats that floated to the surface.
■References (Books, papers, Web articles, etc.)
『ニホンザルの生態』 河合雅雄 （河出書房新社、1969）
「ニホンザルにおける類カルチュア」 川村俊蔵（『サル 社会学的研究 今西錦司博士還暦記念論文集２』)所収 （中央公論社、1965））
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