Japanese public broadcaster NHK aired program The Close-up Gendai (Modern Close-up) on Wednesday with episode "Secrets of the Mega Hit One Piece". In the One Piece manga buyer Kinokuniya Bookstores statistics show results quite surprising. The results is 88% One Piece manga buyer are adults, 13% are older than 50 years old, just 12% are 1-18 years old.
I really wonder, why people older than 50 years old still buy a manga or they are just buy for their son?
Source: Yaraon, Comic Natalie via Anime News Network