This study investigates the intelligibility of English with mora-timed rhythm or Japanese Katakana Hatsuon Eigo among NNSs living in a multilingual community, utilizing shadowing to measure the concept of intelligibility. Eighty-six participants (10 Malay NSs, 28 Mandarin NSs, and 30 Tamil NSs) were asked to shadow a recording of a 300-word English speech read aloud by a Japanese speaker, and to check their understanding by comparing the written transcript of the speech to their shadowed voices. The analysis revealed that the overall average of shadowing performance was 46.84% (the Mandarin NSs had a performance score of 33%, the Tamil NSs oriented of 49.54%, and the Malay NSs of 57.67%). Further statistical analysis indicates that the Tamil NSs and Malay NSs significantly outperformed the Mandarin NSs (p<0.01, p<0.01). These findings suggest that: 1) teachers and policy makers should be aware that even heavily Japanese-accented speech preserves intelligibility to some extent and that the listeners' mother tongue might affect such intelligibility, and 2) teachers and policy makers should find a way to promote both intelligibility and Japanese identity in students' pronunciation.