A multi-method approach was used to understand the attitudes of English Language Teachers working in universities in Japan to first language use (L1) in the second language (L2) classroom. Findings indicate that instructors recognise the benefits of the L1 and have awareness of current empirical findings, though, their approach is highly dependent on contextual factors such as the maturity and motivation of learners, learner proficiency and the complexity of content. Prior teaching experience in the Japanese public school system also had a significant effect on their present state suggesting teachers' attitudes are in part driven by the realities of their present and past contexts. The study concludes by suggesting strategies for utilising the L1 in a more systematic manner to maintain engagement levels and scaffold content.