Neppu Kairiku Bushi Road (熱風海陸ブシロード, Neppu Kairiku Bushirōdo) is a Japanese media franchise that was originally announced in 2003 as a collaboration between the companies Gainax, Takara and Broccoli. After a brief hiatus due to the death of the director and the departure of staff members, a television anime is scheduled to air as a 3-hour special on December 31, 2013.
The world is in the pits of despair after being ravaged by a poison called "shinobi" that came to earth via an asteroid. People have run away to a place called "Kairiku" that used to be located at the bottom of the ocean. Here, the people try and protect themselves against the effects of the poison.
There is a single light of hope for people: the "Holy Weapon Giga Road" and the legendary warrior "Yagyuu." These two are needed in order to counter the effects of the poison and, in order to save the world, Ame, a princess of a fallen nation, stands up.