Yujiro Hayami (速水 佑次郎, Hayami Yūjirō, 1932 – 2012) was a Japanese agricultural economist, widely considered to be an authority on the subject. He was a Rockefeller fellow at Iowa University, a winner of Purple Ribbon Medal and a Lifetime member of the International Association of Agricultural Economists. He is credited with the development Hayami Development Economics, an agricultural philosophy on the relationship of a community to the market and the state. He died on 24 December 2012.