This study explored the foreign language teaching efficacy beliefs of Japanese high school English teachers. The study provides a teacher efficacy scale designed for the Japanese context, which could also be used or adapted for similar contexts in the wider East Asian area. Data were drawn from an online survey of 141 participants. Exploratory factor analysis identified five dimensions of latent teacher efficacy beliefs, including individual and collaborative dimensions, and some specific to the Japanese context, such as efficacy for helping students achieve entrance success. Findings also indicate that some dimensions of foreign language teaching efficacy, such as efficacy for using the L2, are generalizable to wider field.