Super Sentai Series - Ninja Sentai Kakuranger

400 years ago, the ninja and the Yokai had a great war. The legendary Sarutobi Sasuke and four other ninja sealed the Yokai Commander Nurarihyon and all his Yokai energies away in a cave protected by the "Seal Door". In the present, the only surviving Yokai, Kappa, tricks Sarutobi Sasuke and Kirigakure Saizo's descendants, Sasuke and Saizou, into releasing the Yokai by opening the "Seal Door". Now these two, joined by three other descendants of the great ninja, become the Kakurangers to fight the Yokai, with the aid of the Three God Generals.