OSAKA--The Airin district of this city's Nishinari Ward is home to flophouses for day laborers, hardly a canvas one might imagine a talented street graffiti artist to revel in. Yet, stencil ...

Artists including Blek Le Rat (the “father of stencil graffiti”), Roc Blackblock, Suriani and Vegan Bunnies defend their actions, and discuss whether such “freedom of expression” on walls ...