Yonezawa Domain
was the 9th "daimyō" of Yonezawa Domain in Dewa Province, Japan (modern-day Yamagata Prefecture), under the Edo period Tokugawa shogunate of Japan. After retirement, he adopted the "gō", or pen name, Yōzan (鷹山). Today, he is best remembered for his financial reforms, and he is often cited as an example of a good governor of a domain