An elderly man soaks in a yuzu-yu bath loaded with the yellow citrus at a sento public spa in Osaka on Saturday -- the day of the winter solstice and shortest day of the year. Because of the fruit's supposed benefits for promoting blood circulation and heat retention, bathing with yuzu on the day is long believed to prevent colds. About 100 yuzu were used in each tub on the men's and women's sides at the sento.
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