This show is one of the legends made by Fujiko Fujio. We can learn a ton of things from this show. This show is the definition of karma ( the relationship between a person's mental or physical action and the consequences following that action). The story goes that Nobita and his friend Doraemon ( a cat robot from the future) returns to Nobita 's timelinr where he desperately tries to help his future better thanks to the bad behaviour and laziness of Nobita which made his actual future a real nightmare where he achieves nothing . So, this is so inspiring to people who does the same as Nobita ( like most of us). There are two main lessons that we can learn from this show: 1) Without hardwork and dedication, life is nothing. 2) Karma is prevalent.