Spanning more than half a century, “Daido Moriyama: On the Road” confirmed the artist’s importance to the story of Japanese photography. The quintessential street photographer, Moriyama has, since 1965, prowled avenues and alleys in Japanese cities and across the globe. His quarry is not only the unguarded human subject, often seen from the side or behind, but also our idealized, artificial replicas of ourselves, from store mannequins to movie-poster idols. Moriyama’s art, despite his penchant for surface and artifice, is anything but celebratory. If his touchstone is Warhol, whose art he seems