One of them, built in 1984 is located in Narita, at the Narita-san Shinshō-ji Temple. Erected on a small hill and with a height of 54 meters, it is visible from a great distance, and many visitors to Japan have noticed it, because it can be seen from the trains coming from Narita Airport to Tokyo (on the right side if you're on a Keisei train and on the left side if you're on a JR train).
EXIF info:
Nikon D90
Lens: 8-16mm F/4.5-5.6G
Focal Length: 8mm
Aperture: F/5.6
Shutter Speed: 1/500s
ISO Sensitivity: ISO 200