Successfully complete the indicated task to unlock the corresponding officer:
Bokuden Tsukahara, Chiyo Yamanouchi, Goemon Ishikawa, and Sukezaemon Ruson: 
Successfully complete one of the "4-Star" scenarios in Challenge mode. 
Masashige Kusunoki: Successfully complete the Kinki region in Local mode. 
Michizane Sugawara: Successfully complete the Kyushu region in Local mode. 
Munetaka Nasu: Successfully complete the Sanyo/Sanin/Shikoku region in Local mode. 
Takauji Ashikaga: Successfully complete the Kanto region in Local mode. 
Tamuramaro Sakanoue: Successfully complete the Ezo/Mutsu/Dewa region in Local mode.
Yoshinaka Kiso: Successfully complete the Koshin/Hokuriku/Tokai region in Local mode.