Toyotomi Hidetsugu A practitioner of the shudō tradition , Hidetsugu had a number of Wakashū . Among these were Yamamoto Tonoma , Yamada Sanjuro , and his most beloved , Fuwano Mansaku ( also Bansaku ) , who gained lasting renown for his beauty of body and spirit . Life . Hidetsugu was born to Hideyoshi ' s elder sister , but adopted by the Miyoshi clan and given the name Miyoshi Nobuyoshi . He later renamed himself Hashiba Hidetsugu , in honor of his famous uncle : " Hashiba " was the Hideyoshi ' s family name , and " Hidetsugu " can be translated as " next " Hide " " . After the Incident at Honnō - ji in 1582 , Hidetsugu was given a 400 thousand koku fiefdom in Ōmi Province because he was one of Hideyoshi ' s few relatives . In his subsequent career as a general , he sustained heavy losses in the Battle of Nagakute against Tokugawa Ieyasu , but he proved himself in Hideyoshi ' s Invasion of Shikoku and Siege of Odawara . He also proved a competent manager of the castle town of Ōmihachiman . In 1590 , ( Tenshō 18 ) , he was appointed castellan of Kiyosu Castle in Owari Province , where Oda Nobukatsu had once ruled . The following year , Hideyoshi lost his legitimate heir Tsurumatsu ( who died before adulthood ) and so gave Hidetsugu the position of Kanpaku , regent to the Emperor . This meant Hidetsugu had to move to Jurakudai in Kyoto , and resulted in a so - called " dual system of government " ( 二元政治 ) run by Hidetsugu and Hideyoshi , with the assumption that Hidetsugu would succeed Hideyoshi after his death . As Hideyoshi was busy handling the Seven - Year War in the Korean Peninsula ( Battles of Bunroku and Keicho ) , Hidetsugu acted in his place to handle domestic affairs . However , in 1593 , Hideyoshi ' s concubine , Yodo - dono , gave a birth to a new heir , Hideyori , and the relationship between Hidetsugu and Hideyoshi began to deteriorate . Rumours spread of Hidetsugu committing repeated and unjust murder , earning him the nickname " life - killing kanpaku " ( 殺生関白 ; sesshō - kanpaku ) - although modern historians doubt that these rumours were accurate . Finally , in 1595 , Hidetsugu was accused of plotting a coup and ordered to commit seppuku at Mt . Koya . Together with him died his three wakashu , who committed seppuku with his assistance . Daimyo associated with him were confined and the Jurakudai was destroyed . Controversially , Hideyoshi ordered the execution of Hidetsugu ' s entire family , including children , wives and mistresses , at Sanjogawara . The harshness and brutality of executing 39 women and children shocked Japanese society and alienated many Daimyos from Toyotomi rule . Combined with the fact that Hidetsugu was the last adult member of the Toyotomi clan besides Hideyoshi himself , the whole incident is often seen to be one of the key causes of the Toyotomi downfall . In a particularly tragic case , Hideyoshi refused to spare the life of Mogami Yoshiaki ' s 15 year old daughter , who had only just arrived in Kyoto to become Hidestugu ' s concubine and had not yet even met her husband - to - be . Her death caused the powerful Mogami clan to zealously support Tokugawa Ieyasu in the Battle of Sekigahara against Toyotomi loyalist forces , a mere 5 years later . Only one of Hidetsugu ' s children was spared : a daughter named Okiku , one month old , who was adopted by her grandfather ' s nephew , Goto Noriyoshi ( Goto Okiyoshi ? original : 後藤興義 ) .