A constructivist approach to language learning can motivate students by activating their brains to create new knowledge and reflect more consistently and deeply on their language learning experience. The present study focused on assessing the use of the Artificial Intelligence (AI) speakers Google Home Mini and Amazon Alexa as part of a Blended Learning (BL) environment to improve the English skills of two groups of native Japanese undergraduates. The participants were 47 native speakers of Japanese, all third-year business majors at a private university in Tokyo. Pretest and posttest Test of English for International Communication (TOEIC) scores, as well as results from a post-training survey, were used in evaluating the overall effectiveness of the program. Gains in TOEIC scores indicated the BL program incorporating AI speakers improved the students' overall English skills, particularly listening comprehension. The results suggest the integration of AI, along with social media and 21st-century skills, may be an effective way to improve the English language proficiency of adult L2 learners. [For the complete proceedings, see ED600837.]