Ogasawara Nagatoki was a prominent Japanese samurai and military leader during the late 16th century. He served the Uesugi clan, a powerful family in the Sengoku period, known for their strategic prowess and military strength. Nagatoki played a significant role in various battles, contributing to the clan's efforts to maintain power in the region. Nagatoki is also recognized for his administrative skills and efforts in governance. His leadership helped stabilize the territories under the Uesugi clan's control, allowing for economic growth and development. His legacy is remembered as part of the rich history of the Sengoku period in Japan.