Daido Moriyama is a master of street photography, but the way he sees himself is a little more humble.

"When I have a project I am working on, I'll basically leave my place before noon like a stray dog," he says in his biographical film "Memories of Dog." The Japanese photographer, now 75, likens his working method to that of an animal on the prowl, "circling like a stray dog or alley cat, or even sometimes like an insect. I'll go from alley to alley, resurface and then enter another alley, and I just...