Quality inclusive education has been guaranteed at the international policy level, but for inclusive education to be realized, teachers must be prepared to teach students with a wide variety of support needs. With well over a billion English language learners worldwide, and considering the fact that language learning can present many unique barriers to students with disabilities, the TESOL field has a growing need to consider how to best train teachers to teach inclusively. English language teachers (ELTs) generally lack training to teach students with disabilities, and little research has been done to identify specific training needs. If language learning environments are to honor the human right to inclusive education, then this is a critical research gap to close. This study reports on the use of a novel instrument, the Inclusive Practices in English Language Teaching Observation Scale (IPELT), in combination with post-observation interviews, to determine specific training needs among ELTs working at the postsecondary level in Japan. Magnitude coding of IPELT results and thematic analysis of field notes and interview data from 13 participants suggests that ELTs in this particular context would likely benefit from training in differentiation and specific considerations for teaching students with disabilities, as well as identifying possible students with disabilities. The participants also demonstrated a foundational skill set to create inclusive learning environments despite a general lack of relevant training.