https://en.wikipedia.org/wiki/Tsugumi_Ohba

There is speculation that Tsugumi Ohba is a pen name of manga artist Hiroshi Gamo, notably by Toshio Okada.[12][13] Among other supposed hidden clues in Ohba's works, supporters of the theory point out that in Bakuman the main character's uncle was a one-hit wonder manga artist who worked on a gag superhero manga, similar to Gamo and Tottemo! Luckyman, and also that the storyboards drawn by Ohba resemble Tottemo! Luckyman in style.[12]