Research has suggested that the type and frequency of learning strategies employed by successful listeners is greater than their less successful counterparts. Based on evidence that metacognitive strategies (e.g. listening-for-gist; inferring meaning) are more effective than cognitive ones (e.g. word-for-word translation), this study sought to measure the effect that rhymical training had on the listening comprehension acuity of 313 Japanese university students. The theoretical basis was that rhythmical priming assists learners parse the input based on prosody and identify salient words by stress. Small but significant increases were observed among students who were rhythmically trained, compared to a comparison group that received explicit instruction but no rhythm training, and a "true" control group that received no treatment. These results extend the feasibility of input enhancement, rhythmic priming, and perception-based instruction beyond the traditional grammar and pronunciation instruction domains.