Doraemon the Robot Cat

Doraemon (also known in some overseas markets as Doraemon: Gadget Cat from the Future) is a Japanese manga series created by Fujiko F. Fujio which later became an anime series and an Asian francise. The series is about an earless robotic cat named Doraemon, who travel back in time from the 22nd century to aid a schoolboy, Nobita Nobi.

Doraemon is sent back in time by Nobita Nobi's great-great grandson Sewashi to improve Nobita's circumstances so that his descendants may enjoy a better future. In the original time-line, Nobita experienced nothing but misery and misfortune manifested in the form of poor marks and grades, physical disasters, and bullying throughout his life. This culminates in the burning down of a future business he set up which leaves his family line beset with financial problems. In order to alter history and better the Nobi family's fortunes, Sewashi sent him a robot called Doraemon.

Doraemon has a pocket from which he produces many gadgets, medicines, and tools from the future. The pocket is called yōjigen-pocket (lit. fourth-dimensional pocket). Some of the gadgets (dōgu) are based on real Japanese household devices with fanciful twists, but most are completely science fiction (although some may be based on folklore or religious stories). Thousands of dōgu have been featured in Doraemon. The number of dōgu has been approximated at 4,500. It is this constant variety which makes Doraemon popular even among adult readers/viewers. In the series, the availability of dōgu depends sometimes on the money Doraemon has available, and he often says some dōgu are expensive in the future.