The Busiest Mangaka Ever: Shinji Mizushima
The Mandana Tsushin (Manga Bookshelf Transmissions) Blog ponders who is the busiest mangaka, and has written a series of articles listing the achievements of some of the busiest mangaka in history.
In the previous entry's comment column, it was pointed out to me that I'd neglected to mention the 1970s mangaka Shinji Mizushima. Oops... I did, didn't I. So I did some investigating on him.
First, in Champion:
Shinji Mizushima's magazine debut was in Shonen King, but he wasn't blessed with a big hit. During this period in King, other works of his having to do with pro wrestling and the like (not with baseball) were run.
Shinji Mizushima and Jump don't seem to go together, but in addition to his short stories, he had this one. The documentary one, using Oota Kouji as the model.
Shinji Mizushima also had serials that ran twice monthly.
If you closely examine it, as we just have, 1974 seems to have been his busiest time. The weekly magazines were Champion, Sunday and King. Then there was his irregular serial in Magazine (if one counts up the chapters, in this one year he published about 23 times in Shonen Magazine). And Big Comic Original twice monthly. Wow... he's awesome, too.
Then, too, you've got to take into consideration that, with Shinji Mizushima, almost all of his manga is baseball manga ... Amazing that he managed to keep the ideas coming.