In e-learning environments, 'digital badges', often referred to as 'micro-credentials', are expected to function not only as valid indicators of learner's accomplishments but also as useful tools for motivational and reward purposes (Clayton, 2012). In this study, we investigated students' perceptions about the use of digital badges in an online terminology course we had developed (Iwata et al., 2017). We hypothesized that the badges which students earned for the course would not only function as an indicator of their achievement but also help enhance their learner autonomy. Through a three-year survey on students' perceptions of their course of study in this course, we found that a large majority of students (88.3%) were satisfied with their study through this course and that most of the students (69.7%) found the use of badges helpful in confirming their course achievements. The results also showed that two-thirds of them (64.3%) found that earning badges helped motivate them toward further autonomous study. These findings indicate that the use of digital badges can provide students with opportunities to enhance their learner autonomy[For the complete proceedings, see ED600837.]