The prefecture's flower symbol, a species of orchid, is also related to the heron because it is said to look like a flying bird, hence it is called in Japanese sagi-so, "heron grass".
Here it is represented on the cities artistic manhole covers...
EXIF info:
Nikon Df
Lens: 24-70mm F/2.8G
Focal Length: 32mm
Aperture: F/6.3
Shutter Speed: 1/250s
ISO Sensitivity: ISO 400