Koyo Gunkan

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  • Japanese: 甲陽軍鑑 (Kouyougunkan)

The Koyo Gunkan is a history of the Takeda clan of Kai province from the birth of Takeda Shingen to the death of his son Katsuyori. A substantial part of the Kôyô Gunkan is a treatise on military tactics and administrative affairs. The original consisted of 20 scrolls. It is believed to have been written by Kosaka Masanobu, a general of Takeda Shingen and later, Takeda Katsuyori.

Book Information

  • Kôyô Gunkan. (Edited by Yoshida Toyo), 19th edition, Tokyo, August 2005.