The body was discovered Saturday morning about 120 meters below a cliff at Mount Arafune, where the 51-year-old Usui had gone on one of his regular climbs. Police say the mangaka died from collapsed lungs and other injuries sustained in the fall on the afternoon of Sept. 11.
The popular Crayon Shin-chan, which debuted in 1990, follows the adventures of a rude, crude and rambunctious 5-year-old boy in Usui's hometown of Kasukabe who's obsessed with bodily functions and older girls. The manga was adapted as an animated television series in 1992, and has spawned 17 anime films.
Japanese publisher Futabasha will continue to serialize Crayon Shin-chan in Manga Town magazine until November. The fate of the anime series is unknown.
The manga is published in North America by DC Comics' CMX imprint.