Furin Kazan

The 46th Historical Drama is a life story of Yamamoto Kansuke, a lonely genius of strategy in the Age of the Civil War in the 16th century. Kansuke works under Takeda Shingen and pursues his dream of unifying the whole country by aiding the warlord of Kai. At the same time, Kansuke supports Shingen's concubine Yu through his selfless affection for the woman who hates but eventually loves the warlord who killed her father and family. With the aid of Kansuke's strategies, Shingen expands his power northward, where he is destined to fight with Kenshin Uesugi, the warlord of Echigo. The drama portrays how those who fight for their dreams face their destinies in the turbulent age.
(Source: AsianWiki)
~~ Adapted from the novel "Furin Kazan" (風林火山) by Inoue Yasushi (井上靖).