Featured in NHK Special "Unsolved Cases": Top-secret documents obtained shed light on "the greatest mystery of the occupation period" - former intelligence officer surviving speaks on camera

Tokugawa Ieyasu：The hidden dream of a "huge castle": Nagoya Castle, which was decided to be built after the Battle of Sekigahara. Stone walls investigated using the latest technology, "certain traces" discovered? On "N-Spec"

NHK：The world's first photo of a spectacular view from "Japan's last unexplored region" A large underwater cave discovered on Minamidaito Island, where unknown creatures were also spotted! Tonight on N-Spec

Simulation: Defeat in the Summer of 1941：On the eve of the outbreak of war between Japan and the United States, young elites reached a conclusion. Introducing the synopsis of the N-Spec that will be of great importance to us today and tomorrow.

Masato Sakai："N-Spec" approaches the mysteries of ancient Egypt. The latest science reveals the inside of the pyramids, and a world-first discovery is made.

NHK Special：A look at the Japan Ground Self-Defense Force's "Unexploded Bomb Disposal Unit" - "Just in case," says a member who rushes to the scene

NHK Special：What is the Ministry of Finance's Government Bond Planning Division, which is responsible for issuing and drafting government bonds? A look into the unknown