Story
Film by Shin-Ei Animation — Summer 1981, 1 episode, Finished.
As a summer assignment, Nobita has to research the past of his town. Together with Doraemon, they use a gadget called time camera to take photos of the town sights from various time periods. To their great surprise, the last photo they take depicts Japanese folk hero Momotaro pulling a cart laden with treasure. Later, Nobita's mom encounters a foreigner who shows the kids a small picture of a person dressed as samurai. The picture looks almost like a photo, and the person in the picture looks exactly like Momotaro.
Synopsis via AniList (English).
