In our critical review, we explore the progress of second language (L2) teaching research in Japan from 2019 to 2023, focusing particularly on English Language Teaching (ELT) and Japanese Language Teaching (JLT). After scrutinising numerous publications from over 50 academic journals, as well as academic books and chapters, we selected around 40 studies for analysis. These studies met our screening criteria of articles published in Japan, which were written in English or Japanese, peer-reviewed, presented original findings or insights, and focused on the Japanese context. We highlighted six key areas: grammar, language testing, teachers’ professional development, the realities and influences of foreign residents and immigration, the identity of language learners/users and language education policy. Through our review, we provide notable characteristics, developments, and challenges in L2 teaching research in Japan for a global readership. This contribution furthers the ongoing conversation and sets directions for future research in this field.
