The ongoing outbreak of dengue fever traced to Tokyo's Yoyogi Park is prompting consumers to snap up anti-mosquito skin sprays in a season when sales of the item usually decline, while a novel type of mosquito guard is also seeing a sudden surge in demand, industry sources say.

From pesticide sprays, skin sprays and mosquito-slaying vaporizers to the traditional smoking green coils, products designed to ward off the blood-sucking insects usually see a drop in sales in September after the peak months of July and August.

But shipments of the products show no sign of abating at Tokyo's Earth Chemical Co.