UPDATE: Due to the dengue fever outbreak in Yoyogi Park, the Vietnam Festival has been cancelled.
Some of Yoyogi Park's nationally themed fests do a better job of staying on message than others. Although the annual Vietnam Festival can always be counted on to supply ample quantities of bánh mì, 333 Beer and pho, its lineup of live entertainment is rather more schizophrenic: in past years, live performers have ranged from V-pop singers to a Japanese Queen tribute band. This year, you'll at least be able to enjoy the interesting form of traditional art known as 'water puppetry', a practice that goes back centuries in Vietnam.