Nebuta matsuri is one of the most famous Summer festival held from August 2 to 7 at night. Only last day, Nebuta parade at daytime and there is sea traveling at night with fireworks.
Nebuta is a huge paper dolls with light inside. Therefore, it will blight beautifully at night. Every year people design new Nebuta. There are over 20 super decorated Nebuta. 5 to 7 best Nebuta will be traveling in Mutsu Bay.
The ships with Nebuta travel from east side of Mutsu Bay and back to the same spot. The fireworks and Nebuta is very beautiful combination.
The origin of Nebuta is unkown. One of legend said, it was the combination of Tanabata Matsuri and local ceremony of floating candle and dolls. The current style started around early 18th century. It was imitated from Neputa Masturi of Hirosaki.
http://www.nebuta.or.jp/