In the 12th century, the country was suffering a long period of rain which caused a serious famine. People invited Young Prince to the traveling place to ask him for help. This is the origin of Honorable Festival dedicated to him. This festival is the biggest festival in Nara and is famous for the traditional procession.
Can you guess what they are doing in the procession? A hint is that many horses also are joining the procession.
Maybe even Shinto deity is tired of daily routines and needs to travel. Some Shinto deities are much like human-beings. They love, fight, get sad and happy. In many ways, Shinto deities are compared to Greek gods and goddesses. It's interesting there are many similarities in both Japanese and Greek mythologies.
note: Shinto is a indigenous religion based on nature worship in Japan.