Nobuzane (武田信実) more commonly known as Kawakubo Nobuzane (河窪 信実) (died 29 June 1575) was a younger half-brother of Takeda Shingen, a preeminent daimyō (feudal lord) who vied for the control of Japan in the late stage of Sengoku, the "warring states" period. He was also called Kawakubo Nobuzane because he was raised in Kawakubo village. After the death of his older brother Matsuo Nobukore in 1571, Shingen ordered Nobuzane’s son Nobutoshi to be the successor to the Matsuo family and Nobutoshi was married to Nobukore’s daughter.