Season
Season 6 Episode
- Season 4 Ground Detective Simon Wallis: Case 2 Soy Sauce
- Season 4 Fishing Crazy: Divine Duel at Sea
- Season 4 Close to ART: WATARI-UM - The Watari Museum of Contemporary Art
- Season 4 Through the Kitchen Window: Iga - Creating New Out of Old
- Season 4 A Treasured Creation: Today's Treasure - Ai, the Natural Indigo of Japan
- Season 4 A Treasured Creation: Today's Treasure - Keeping Barrel-brewed Soy Sauce Alive
- Season 4 Starting Over: Back to School Part 3
- Season 4 Starting Over: The Flight Goes On Part 3
- Season 4 Starting Over: Hotels Old and New Part 3
- Season 4 A Treasured Creation: Today's Treasure - Natural Ice Farmers
- Season 4 Fishing Crazy: Bonding With a Scaly Partner
- Season 4 NINJA TRUTH Episode 15: Ninja Communication
- Season 4 NINJA TRUTH Episode 16: The Fuma Ninja
- Season 4 Through the Kitchen Window: For the Love of Akigawa's Sweetfish
- Season 4 Ground Detective Simon Wallis: File #3 "The Case of the Udon Noodles"
- Season 4 A Treasured Creation: The Bond with Urushi, Japanese Lacquer
- Season 4 Fishing Crazy: Anglers in Wonderland
15 Minutes - Season 4 Episode 12 NINJA TRUTH Episode 15: Ninja Communication
6.50 15 minutes Since ninja were engaged in espionage, they had to gather information and accurately convey it without anyone knowing. Typical means of information transmission included smoke signals, a cipher using knots in a rope, and special methods of transporting secret messages. But in the second half of the episode, we'll look at their ultimate method of concealing information: invisible ink! Find out how they did this, and follow Chris as he makes his own secret message with ninja techniques.
