sd_sengokuden
Also known as the Musha Gundam series, this division of SD_Gundam features samurai- and ninja-inspired variations of machines from the Gundam franchise.
It also served as inspiration for characters in the SD_Gundam_Force and SD_Gundam_Sangokuden anime series.
Not to be confused with SD_Gundam_Sangokuden (戦国伝 'SENgokuden' vs 三国伝 'SANgokuden').