Nick Dauphin’s review published on Letterboxd:
Who would have thought that a hilarious and somewhat poignant film about the negligence of the elderly would come in the form of a sci-fi anime mecha rampage? Roujin Z addresses issues like the lack of consideration to the aging population ("Why does she care about him? He's just an old man!" shouts one of the characters) and the wisdom/passion they have that the public seldom acknowledges (the elderly hackers). Both of these are exaggerated to city destroying comic extremes. However, the animation and visuals range from disappointing to breathtaking levels. Even so, Roujin Z isn't short of thrills and doesn't pull any punches. I can only wonder as to why this isn't cited as an anime classic more often.