Manga creator Fujiko A. Fujio, whose real name is Motoo Abiko, has passed away on Thursday morning at his home in Kawasaki, Tokyo, at the age of 88.

According to the news report on TBS News, the Japanese police responded to a call that reported someone had collapsed at about 8.40 am, but Fujiko had already passed away by the time that they arrived at the scene. The cause of death has yet to be determined.

Fujiko A. Fujio is best known for co-creating Doraemon with Fujiko F. Fujio, whose real name is Hiroshi Fujimoto, under the combined singular pseudonym of Fujiko Fujio. They worked on the manga from 1970 to 1996 before parting ways in 1987, with Abiko taking the Fujiko A. Fujio, and Fujimoto taking Fujiko F. Fujio. Fujimoto later passed away in 1996.

Besides Doraemon, Fujiko A. Fujio also worked on manga such as Ninja Hattori-kun, Kaibutsu-kun, Pro Golfer Saru, and Warau Salesman. RIP to the late legend and condolences to his family.