changed as of 10th story "大河ドラマ 葵 徳川三代". NHK名作選 (in Japanese). NHK. Retrieved 12 November 2019. 全編ハイビジョンで撮影された最初の「大河ドラマ」 "風林火山". NHK. Archived from the original...

According to the descriptions in Kōyō Gunkan (甲陽軍鑑), Hokuetsu Taiheiki (北越太平記) and Hokuetsu military talk (北越軍談). Sansom 1961, pp. 246, 288. Turnbull 1998...