Previous studies have revealed that reading fiction is associated with dispositional empathy and theory-of-mind abilities. Earlier studies established a correlation between fiction reading habits and the two measures of social cognition: trait fantasy (i.e., the tendency to transpose oneself into fictitious characters) and performance on the Reading the Mind in the Eyes Test (RMET; a test of the ability to identify others’ mental states based on their eyes). Recently, experimental studies have shown that brief exposure to fiction enhances RMET performance. Nevertheless, these studies have been conducted only in Western countries, and few published studies have investigated these relationships in Asian countries. This research aims to address this gap. Study 1, which involved 338 Japanese undergraduates, conceptually replicated the previously reported correlations between fiction reading and fantasy and RMET scores (after statistically controlling for the effect of outliers). However, Study 2, which involved 304 Japanese undergraduates, failed to replicate the causal relationship. Participants read an excerpt either from literary fiction or from nonfiction, or engaged in a calculation task, before completing the RMET. Brief exposure to literary fiction did not increase the RMET score. In sum, this study replicated the associations of fiction reading with fantasy and RMET scores in Japan, but failed to replicate the causal relationship.