The Men Who Created Gundam(2009)

"Gundam" wo Tsukutta Otoko-tachi.

An fiction based story involving Yoshiyuki Tomino's trials and tribulations in attempting to create the next generation in Japanese anime. This is the story of the events surrounding the creation of the Mobile Suit Gundam series and its shaky and turbulent foundation. While this story is mainly fictional, the central elements and characters are indeed real which gives some factual basis for the story.

Was first serialized as Gundam Sousei (ガンダム創世), part of the Gundam-san series.
Also includes the side story Tomino Den (トミノ伝) and two extras.