Seto Kingdom Day is celebrated on the first Sunday of November in the Seto Inland Sea region of Japan. This day honors the historical significance of the Seto Kingdom, a cultural and economic hub that thrived during the Edo period. The celebration includes various local events, showcasing traditional crafts, food, and performances that highlight the area's rich heritage. The day aims to promote awareness of the Seto Inland Sea and its unique environment, encouraging tourism and community engagement. Activities often involve local artisans, fishermen, and cultural groups, fostering a sense of pride and connection among residents and visitors alike.