'I'm not always a stray dog. Sometimes I'm a cat," says Daido Moriyama. "Or an insect."

A stray dog with piercing eyes and a hint of a snarl may be the most famous of the monochrome images captured by the Japanese master of black and white photography. And as Moriyama nears his 70th birthday, it is clear that his feral days of roaming the streets, camera in hand, are not yet over.

"As long as I can walk, I will continue wandering the streets," he says. "The streets are my territory and I still wander them aimlessly with my camera."