In 'Dokai Koushuki', which is a record secret agent of bakufu investigated behaviors of daimyo (Japanese feudal lord) around the country, Naganori is praised that he was bright with knowledge.
幕府隠密が全国の大名の素行を取り調べた“土芥寇讎記（どかいこうしゅうき）”には長矩について「智有って利発なり。