Imo Meigetsu

The fifteenth night (of the eighth lunar month) is known as jugoya (fifteenth night), or alternatively as imo meigetsu (potato moon). This is because the moon was compared to a taro potato (satoimo), which is a round, white tuber with vigorously growing stalks. Sometimes these potatoes are offered instead of or alongside dango cakes during moon viewings. In the Kansai region, around Osaka and Kyoto, it was traditional to offer to the moon the first taro potatoes harvested that year. This tradition continues into the present day.