Musha Gundam
are Gundam units modelled after samurai, ninja, or other forms of feudal Japanese warriors. Musha Gundam first appeared in "Plamo-Kyoshiro"&lt;プラモ狂四郎&gt; (Story by Craft dan and art by Koichi Yamato). In the story, the "SD Gundam" is an original Gundam created by Kyoshiro (protagonist) for a showdown with Shigeru (antagonist). The original design of the SD form Musha Gundam is credited to Koichi Yamato, and Yasui Hisashi. The story of Musha Gundam, SD Sengokuden, originated from the manga "Seven Gundams" of the "Comic World" series by MARSHI (a.k.a. Susumu Imaishi). The Musha Gundam series is the longest running SD Gundam series, since the series is set in the Warring States period the use of katakana is avoided, and kanji is used heavily.