Takamatsu city, in the Kagawa Prefecture (Shikoku Island) decided to use the fame of the artistic manhole covers to present a lot of information: the local Udon dishes, because the city is nicknamed the "Udon Kingdom", the traditional Temari balls, and also a QR code for the website of Sunport Takamatsu, the business and shopping district erected around JR Takamatsu Station.
EXIF info:
Nikon Df
Lens: 24-70mm F/2.8G
Focal Length: 38mm
Aperture: F/7.1
Shutter Speed: 1/1000s
ISO Sensitivity: ISO 400