[Machine Translation] Nobunaga's dream was entrusted to the father and son, the greatest master builders in the world. Build a five-storied main keep that soars to the heavens! Okabe Mataemon and Itoshi, who were ordered to build the gigantic Azuchi Castle, took on an unprecedented project in order to give shape to an impossible task. This Seicho Matsumoto Award-winning novel explores the true story of this unprecedented structure, which was completed by taking into account the ambition of Nobunaga and the will, passion, and ingenuity of the carpenters.