The Watanagashi Festival is a traditional Japanese celebration held in various regions, particularly in the village of Hinamizawa. It typically takes place in June and is associated with the worship of the river deity, Kaminari-sama. The festival features rituals, music, and dance, highlighting the community's connection to nature and their cultural heritage. During the festival, participants often float small, decorated rice offerings down the river, symbolizing gratitude and respect for the water's life-giving properties. The event also includes various games, food stalls, and performances, fostering a sense of community and continuity among the villagers and visitors alike.