Yang Kuo-chiang or John K. Young is a soldier of the Republic of China. He was the Director-General of the National [Security Bureau (Republic of China)|National Security Bureau] in 2015–2016.
Yang was appointed as the Director-General of the National Security Bureau by President Ma Ying-jeou in July 2015 when his predecessor Lee Shying-jow resigned from the position citing personal and health reason. On 19 October 2016, Yang tendered his resignation to President Tsai Ing-wen citing that he believed that he has completed his mission during the government transitional period after Presiden Tsai was sworn in on 20 May 2016.