Doraemon (2005) is the most recent anime series based on Fujiko Fujio's manga of the same name.
It is the 2005 version of 1979 series, with certain changes in the animation and other things.
Doraemon is a cat-like robot who appears in the present to steer Nobita/Noby, who is a dumb, naive and clumsy boy on the right path in order to secure his future. Nobita's love interest is Shizuka Minamoto/Sue, his frenemies are Takeshi Goda/Big G and Suneo/Sneech.
I bet many anime fans think that One Piece has been airing forever. But it isn't anything compared to the classics on this list! Come learn about the 15 longest running anime series in Japan, very few of which have been released overseas!