National Foundation Day, known as 'Kenkoku Kinen no Hi' in Japan, is a significant annual holiday that commemorates the formation and historical roots of the country. Celebrated on February 11th, the holiday is deeply rooted in the mythology of the nation, marked as the day when the first Emperor of Japan, Emperor Jimmu, ascended to the throne in 660 B.C. The day is a poignant celebration of the country's cultural heritage and lineage.

National Foundation Day is typically marked with the flying of the national flag and speeches made by politicians. Many people consider this as the day for fostering patriotic feelings and reinforcing their cultural identity. It is also an occasion where the Emperor and other members of the imperial family participate in a ceremony at the Imperial Palace. This ceremony involves a reading of the Imperial Rescript on Education and promoting love for the country among the younger generations.

Despite its serious undertone, National Foundation Day is also a time for joyous activities. In some regions, there are festivals that include performances, parades, and other recreational activities. It is also common for families and communities to participate in Shinto rituals, paying homage to their ancient origins. While it's not as grand and festive as other Japanese holidays, National Foundation Day remains a profound occasion that underscores the richness of Japan's history and traditions.