Kidou Senshi Gundam Gaiden: G no Kagenin(1988)

Kidou Senshi Gundam Gaiden: G no Kagenin

G no Kagenin is a spin-off manga of Mobile Suit Gundam that was serialized in Cyber Comics magazine irregularly. Its main feature is that most of the mobile suit pilots, including the main character, are ninjas. For this reason, many of the mobile suits themselves have been arranged.

(Source: Wikipedia, translated)