Kyukei no Koya(1978)

Kyukei no Koya is a Japanese drama series based on Seicho Matsumoto's 1962 novel. Set in 1945 as World War II nears its end, the story follows Kumiko, whose world unravels when she discovers evidence that her father—officially dead in a Swiss hospital—is actually alive. Kenichiro Nogami has abandoned his family and country to work in secret, determined to save Japan from destruction. As Kumiko searches for answers, a series of murders erupts around her, pulling her deeper into a dangerous web of wartime conspiracy and hidden truths. The series weaves together mystery, historical intrigue, and family drama as Kumiko grapples with her father's shocking double life and the deadly consequences of his clandestine mission.