In Kawagoe, the local manhole covers feature the official flower of city, kerria japonica, known as Yamabuki in Japanese and the official tree of city, the oak (Kashi in Japanese).
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 24mm
Aperture: F/5.6
Shutter Speed: 1/400s
ISO Sensitivity: ISO 200