The dominant view in the field of Japanese phonetics and phonology is that Japanese metrical prominence, if anything, manifests itself as pitch accent, whose primary acoustic correlate is F0 fall. Work by Osamu Fujimura has challenged this view, by arguing that Japanese has stress, which is realized by way of increases in jaw opening. In addition, he argues that jaw displacement patterns show declination within a phrase, just as F0 does. This paper reports an experiment using EMA (ElectroMagnetic Articulograph) which examined these claims. The results of the current experiment show that these claims by Fujimura are in principle correct empirically, and hold across all six native speakers of Japanese tested in this experiment. In addition, the current results reveal that Japanese exhibits final stress, which is a new finding going beyond the original insights offered by Fujimura's work. A further acoustic analysis shows that initial and final stress manifest itself in high F1, and surprisingly, low intensity. All in all, we conclude that Japanese has both initial and final stress, with declination observed within the phrase-internal syllables.
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