PurposeConsumer animosity is often used to explain consumers' boycott of products from a foreign country in a dispute. However, these studies are mainly cross‐sectional. The purpose of this paper is to investigate temporal changes in two distinct consumer‐animosity dimensions – i.e. historical and contemporary – and their influences on judgment of and willingness‐to‐buy foreign products.Design/methodology/approachSampling came from a mall‐intercept survey in Japan during the height of a recent Japan‐China dispute (n=139), followed by a similar survey six months later (n=157). Identical questionnaires tapped Japanese consumers' historical animosity (HA), contemporary animosity (CA) and ethnocentrism dispositions, and judgment of and willingness to buy Chinese products. The data were fitted using structural equation modelling.FindingsThe results indicate that both CA and HA lowered willingness to buy Chinese products during, but not after, the dispute. CA was consistently stronger than HA in influencing willingness to buy. By contrast, product judgment did not influence willingness to buy during the dispute. That is, animosity dispositions overshadowed objective product evaluation during the dispute. After the dispute, only product judgment directly influenced willingness to buy, and HA indirectly influenced willingness to buy via product judgment. CA weakened after the dispute, but HA remained stable over time. Product judgment was lower during the dispute. Consumer ethnocentrism interacted only with CA during but not after the dispute.Practical implicationsInternational dispute heightens the salience of present‐day issues such as unemployment rather than of historical conflicts. Although product judgment was affected, the downside to foreign firms is temporary. Domestic firms can only take short‐term advantage, but long‐term edge remains improving product judgment.Originality/valueDespite extensive research into the influence of consumer animosity on consumer behaviour, surprisingly little research has attempted to investigate the temporal characteristics of the consumer animosity, let alone investigate its distinct dimensions. In this study, the authors attempt to show that unless one considers the potential temporal changes to individual consumer‐animosity dimensions, sweeping conclusions from single‐shot studies may yield an incomplete picture and even misguide managerial initiatives.