Hamamatsu Castle was the residence of Tokugawa Ieyasu and served as the starting point for the Edo shogunate, a stepping stone to unifying the country. Furthermore, many of the lords of Hamamatsu Castle later held important positions in the shogunate, making it famous as the "Castle of Success." In Hamamatsu, it is affectionately known as the "Success Daimyo Ieyasu-kun."