and daimyō of the province of Kai. He had been an accomplished poet in his youth. He assisted his father with the older relatives and vassals of the Takeda clan, and became quite a valuable addition to the clan at a fairly young age. In 1536, at the age of 15, he was instrumental in helping his father win the Battle of Un no Kuchi. At some point in his life after his "coming of age" ceremony, the young man decided to rebel against his father, Takeda Nobutora. He finally succeeded in 1540, successfully taking control of the clan. Events regarding this change of leadership are not entirely clear, but it is thought that Nobutora had planned to name the second son, Nobushige, as his heir instead of Shingen. The end result was a miserable retirement that was forced upon him by Shingen and his supporters: he was sent to Suruga Province, on the southern border of Kai, to be kept in custody under the scrutiny of the Imagawa clan, led by his son-in-law Imagawa Yoshimoto (今川義元), the daimyō of Suruga. For their help in this bloodless coup, an alliance was formed between the Imagawa and the Takeda clans. Takeda campaign Shinano campaign Shingen's first act was to gain a hold of the area around him. His goal was to conquer Shinano Province. A number of the major warlords in the Shinano region marched on the border of Kai Province, hoping to neutralize the power of the still-young Shingen before he had a chance to expand into their lands. However, planning to beat him down at Fuchu (where word had it Shingen was gathering his forces for a stand), they were unprepared when Takeda forces suddenly came down upon them at the Battle of Sezawa. Taking advantage of their confusion, Shingen was able to win a quick victory, which set the stage for his drive into Shinano lands that same year and his successful Siege of Uehara. The young warlord made considerable advances into the region, conquering the Suwa clan's headquarters in the Siege of Kuwabara, before moving into central Shinano with the defeat of both Tozawa Yorichika and Takato Yoritsugu in the Siege of Fukuyo and Battle of Ankokuji. In 1543, he captured Nagakubo Castle, Kojinyama Castle in 1544, and then Takatō Castle and Ryūgasaki Castle in 1545. In 1546 he took Uchiyama Castle and won the Battle of