The Musha Gundam of ancient time travelled to the Pegasus nation (天馬の国), which is Japan in year 2001. 48 Musha Gundams were scattered across 47 Prefectures of Japan.

Whereas the majority of the main cast of Gundams are brand new, the majority of overall Gundams seen are from previous SD Gundam series. Older characters featured usually receive a minor upgrade. For example, the character of Goddumaru loses his God Gundam inspired armour and eventually gains a new set which makes him more resemble the Gundam Double X.

In contrast to previous Musha Gundam series that based designs more on samurai/feudal Japanese history, Ichishiki's designs instead bare more resemblance to the style of tokusatsu heroes such as Ultraman, Kamen Rider and super sentai. This includes a much more focused role on technology within the design aesthetic.