Whisper's Secret Past (Japanese: 妖怪軍師ウィスベェ,Yōkai Gunshi Wisubē) is the 47th episode of the Yo-kai Watch anime series. It was broadcasted in Japan on December 12, 2014, and in the United States on October 5, 2016.
After Whisper is insulted for being called a "know-nothing" from Jibanyan, they are both sent to back to the past by Kin and Gin to relive Whisper's time, aiding Shogun Waitington.
This is the last appearance of Kin and Gin in the anime series.
There is a quest in Yo-kai Watch 2: Psychic Specters which is heavily based on this episode. Split into three different sub-quests, each quest/part of "Whisper's Whistory Lesson" retells this episode, bit by bit. Part 1 goes from the beginning of the episode, up to the discovery of Slicezilla. Part 2 starts from the conflict in the battle, up until Whisper tells Shogun Waitington he is "Private Whispocrates". Part 3 retells the climax of the battle of Sekigahara, up to the end of the episode.
Part of the scenes of the past Nate lookalike feeling distraught for being a "know-nothing" was cut for unknown reasons.
The special opening for the episode was replaced with the regular opening. Though, this wasn't done for western release of the video game.