The Musha Gundam first appeared in "Plamo Kyoshiro". In the story, it is an original Gundam created by Shiro Kyoda for the confrontation with Shigeru. The original design of the SD Musha Gundam form is credited to Koichi Yamato and the Craft dan representative, Yasui Hisashi. With a growing fan base and raging popularity, Musha Gundam produced in 1987 as SD Gundam Gashapon MK13 and in 1988 as BB Senshi No.17. The products were extremely popular with schoolchildren, and thus the Musha Gundam evolved into SD Gundam and spawned a standalone genre.
The story of the Musha Gundam, SD Sengokuden, comes from the manga "Seven Gundams" of the "Comic World" series by MARSHI (aka Susumu Imaishi) which is published in the BB Senshi No.17 Musha Gundam kit assembly manual. In this Manga, Musha gundam, aka "Musha", is the eldest son of Shodai Shou Gundam and twin brother of Noomaru. He is also the leader of the Seven Mushas and the strongest musha of the Gundam army. The only one of the Seven Mushas without a guardian beast, he is the cousin of the current Daishougun. He was then promoted to Sandaime Daishougun.
He is also one of the three heroes summoned to fight against the Overlord Space force in Musha Knight Command SD Gundam Scramble.