Four sisters with no consanguinity are living together since childhood. When facing misfortune and grievances in lives, they give support and encouragement to each other, even sacrifice oneself to help others.

Ten years before the outbreak of the Second World War in Asia, a Japanese Go master and his Chinese rival meet in China to play a game of Go (loosely described as an Asian version of chess). It soon becomes evident that the Chinese master's son is the most talented player that the Japanese master has ever encountered, and he convinces the boy's father to let him bring the child back to Japan to train him as a professional Go player. Years pass, and as the young Chinese master grows to maturity in Japan, the Japanese invasion of China forces him to choose between his triumphant career and his loyalty to his native country. His decision is complicated by his marriage to the daughter of the Japanese master, with whom he has produced a child. His choice will profoundly alter the lives of two families. Their saga serves as a reflection of the tragic relations between their two great countries, and the possibility of reconciliation and healing.

《武田信玄》是NHK1988年（昭和63年）播放的大河剧。第26代作品。播放期间是1988年1月10日 - 12月18日，全50回。平均收视率39.2％、最高收视率49.2％。主演是中井贵一。 剧情概要 战国时代，四面被山环绕的甲斐国，拥有尽其所能出谋划策的家臣团，不断的扩展领土，率领“战国最强的骑兵团”，连织田信长、德川家康都畏惧的人——武田信玄。追放父亲，逼死亲子，为这样的家族和亲人的悲剧关系感到苦恼的同时，以独特的方法平定了信浓，与越后的上杉谦信在川中岛多次死斗。以“人为城，人为石垣，人为护城河，对己方怜悯，对敌人仇视”为信条，在战国时代顽强生存下去的信玄的一生，以恢弘的战斗场面和豪华的演员阵容描绘的战国画面。