One of the most famous festivals of Tokyo, Kanda Matsuri is also ranked among the three largest festivals of Japan. Protected by the Shogun during the Edo Period, 1603-1867 and permitted to enter the grounds of Edo Castle where he lived, it also came to be called Tenka Matsuri, Tenka meaning Shogun. The main festival is conducted in years ending in odd numbers according to the Western calendar, and the festivals held in even-numbered years are much smaller in scale. The rule to change the scale of the festival in alternate years was determined by the Shogun in the Edo Period, for the festivals then were so extravagant. Festival May 2012.