Kamakura proper is today rather small, it is often described in history books as a former de facto capital of Japan as the seat of the Shogunate and of the Regency during the Kamakura Period. Recent research has revealed however that this was never the case. If Kamakura ruled the Kantō, not only was the Emperor in fact still the ruler of Kansai, but during this period the city was in many ways politically and administratively still under the ancient capital of Kyoto. Kamakura was simply a rival center of political, economic and cultural power in a country that had Kyoto as its capital.According to The Institute for Research on World-Systems, Kamakura was the 4th largest city in the world in 1250 AD, with 200,000 people, and Japan's largest, eclipsing Kyoto by 1200 AD.As of March 1, 2010, the city has an estimated population of 174,016 and a density of 4390 PD/km2. The total area is 39.60 km2.Kamakura was designated as a city on November 3, 1939.Kamakura has a beach which, in combination with its temples and proximity to Tokyo, makes it a popular tourist destination. Kamakura's bay has a surf break off of the headland point, albeit an inconsistent one, which makes it at least a second-tier destination for surfers. It is also noted for its senbei, which are crisp rice cakes grilled and sold fresh along the main shopping street.