The Global and Innovation Gateway for All (GIGA) School Program, an initiative by the Japanese government to provide each student in compulsory education with a computer, was implemented in March 2021. This case study used a mixed methods approach to examine teacher and student attitudes regarding the integration of one-to-one devices in the Year 8 English lessons of two Japanese public junior high schools. Teacher attitudes towards the technology, as well as their perceptions regarding its usefulness and ease of use, have been shown to affect the extent to which teachers utilize computers in their classes. Semi-structured interviews with two teachers were conducted prior to the implementation of the devices in English lessons to determine whether the participants held positive or negative attitudes towards the use of computers in the classroom. The two teachers were interviewed again after a semester to reflect on how successfully the technology had been implemented and its impact on the teachers’ pedagogical approaches. In order to determine the students’ attitude towards one-to-one devices in English lessons a Likert-scale questionnaire using an adapted version of Davis’ technology acceptance model was administered. The results indicated that whilst the teachers were initially concerned as to the insufficient training provided, this issue was overcome through self-instruction and trial and error. This successful integration of the technology was reflected in the students’ positive perceptions regarding the usefulness and efficacy of the one-to-one devices to study English. The experiences and pedagogical practices employed by the teachers are examined as a potential blueprint for English teachers who have been less willing to embrace the use of computers in their lessons.