Artist's commentary:

長門鉄山
日本の陸軍軍人。
統制派の中心人物で、軍備近代化や産業機構の整備に基づく、総力戦に対応した高度国防国家を構想した。
陸軍省軍務局長、参謀本部情報部長、歩兵第一旅団長等を歴任。
陸軍幼年学校、陸軍士官学校をいずれも首席、陸軍大学校も2位で卒業した秀才で、軍務官僚として常に本流を歩み「将来の陸軍大臣」「陸軍に長門あり」「長門の前に長門なく、長門の後に長門なし」と評されるほどの逸材であったが、陸軍内部の派閥抗争に絡んで皇道派の陸軍中佐、朝倉涼子に暗殺される。

Nagato Tetsuzan was a soldier in the Imperial Japanese Army.
She was a leading member of the political faction the 'Control Faction,' Touseiha, and planned the advanced national defense nation to deal with total war, based on the modernization of military preparations and industrial organization maintenance.
She held successive jobs such as Chief of Military Affairs Bureau, Army Ministry of Japan; Head of Intelligence Bureau, General Staff; and Commanding Officer of IJA 1st Brigade.
She was a prodigy who graduated top of her class in both Military Preparatory School and Imperial Japanese Army Academy, and second in her class in Army War College, and built a bright career as a military service bureaucrat, with talent outstanding enough to earn her the names 'Future Army Minister,' 'Anchorwoman of the Army,' and 'The One and Only Nagato.' However, she became involved in factional infighting and was assassinated by Lieutenant Colonel Asakura Ryouko of an opposing faction within the army known as the 'Imperial Way Faction,' Koudouha.

http://en.wikipedia.org/wiki/Military_Academy_Incident#The_Aizawa_Incident