As you can see in this photo taken at Sumiya, in Shimabara, Kyoto, it is a beautiful color, but it was also good at protecting the wood against weather, and at it is also believed to be effective against moths.
EXIF info:
Nikon Df
Lens: 24-70mm F/2.8G
Focal Length: 24mm
Aperture: F/5.6
Shutter Speed: 1/80s
ISO Sensitivity: ISO 4000