Most of those buildings were destroyed during the Battle of Ueno from 1868, and only a few constructions survived until today, like the Benten-do near the Shinobazu Pond, the Bells of Time (toki no kane), the five-story pagoda from Ueno Zoo and the Toshougu Shrine.
Not even the main hall survived and the one we see today, in the photo, was originally located in the Kitain Temple from Kawagoe City and was dismantled and reassembled here in 1879. But even so, I like visiting Kan'ei-ji for the history it evokes and, from all the pictures I took here, I prefer this one, taken on a rainy day, with a warm light emphasizing the color of the wood and with the rain drops almost spoiling the image...
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 18mm
Aperture: F/5.6
Shutter Speed: 1/160s
ISO Sensitivity: ISO 400