[Machine Translation] Hideyoshi Toyotomi succeeded Nobunaga and achieved unification of Japan. The drama of Hideyoshi and the people who surrounded him is depicted as we trace the steps he took to become the ruler of Japan. The book discusses the life of Hideyoshi, including Takenaka Hanbei and Kuroda Kanbei, the "Nibei," Ishida Mitsunari, Kato Kiyomasa, his younger brother Hidenaga, who controlled the vassals, and the "Four Heavenly Kings of Hashiba" who are still unknown. The structure and transition of the vassals may have some relevance to contemporary organizational theory.