Daichouhen Doraemon

"Doraemon" is a series about a robotic cat named Doraemon, who travels back in time from the 22nd century to help a schoolboy named Nobita Nobi. Aside from the normal manga books, their great adventures to different places are specially described in Doraemon Long Stories books. (Source: MU)

The original author, Fujiko F Fujio, died while working on the 17th volume of the series. The rest was continued by his corporation, Fujiko F. Fujio Producton.