- Died: 1581
Nagachika was originally from Ômi province but joined Uesugi Kenshin when the latter was visiting Kyoto in 1559. He was active in the Uesugi's Etchû and Kantô campaigns and acted as something of a diplomat from time to time. After Kenshin's death the Oda clan attempted to bribe Nagachika away from the Uesugi but he refused. He defended Matsukura castle in Etchû and clashed with the advancing Oda armies before dying of illness in 1581.
- Initial text from Samurai-Archives.com FWSeal & CEWest, 2005