Shot at Tomioka Hachiman-Gu, a Shinto shrine in Monzennakacho, Tokyo.
Usually, two guardian dogs flank the approach in a Shinto shrine. And one opened its mouth and the other closed. To open mouth means the beginning of the world and to close the mouth means the end of the world. So they express the whole world.
The guardian dog in the photo was the one which opened its mouth. I thought an announcement might be sent when something was beginning. So the dog seemed to shout the announcement. Yet I could not hear its voice.