In April 2001, Japan curbed imports on three Chinese farm products--fresh shiitake mushrooms, rushes for grass mats, and Chinese onions. In retaliation, in June 2001 China imposed a 100% punitive tariff on imports of three Japanese export products--motor vehicles, mobile phones, and air conditioners. Japan was accused of violating WTO rules. The dispute was subsequently resolved, but given that China was not a WTO member at the time of the dispute, the dispute generated a lot of controversy regarding trade safeguard measures. Introduces students to the WTO dispute settlement mechanism and compares it to the old GATT system, and highlights the role of political interest groups in trade policy. Questions whether Japan had a case for citing their safeguard measures or was it just protecting its powerful shiitake mushroom farmers. In addition, questions whether WTO membership would in turn protect China from trade disputes such as this one.