This festival is most known for the lions heads that come out for the festivities. There are 2 lion heads: one for men and one for women. Women and men carry each one and parade around.
The 10th will be the day when there are the most festivities. That day the main events will begin at 3 pm.
June 6th to the 10th
Address: 東京都中央区築地６丁目２０－３７ (Namiyoke Inari Shrine)
http://www.namiyoke.or.jp/index.html (Official site, Japanese)