Chichibu Shrine itself has over 2,000 years of history. This is a great opportunity to catch an enchanting traditional festival. The large floats, apparently weighing up to 20 tons each are festooned with countless lanterns and decorated with flowers and spears. Also this is a rare opportunity to see fireworks in the winter.
Chichibu is about 2 hours from Tokyo, so keep an eye on trains so you can get back in time!