During the Meiji Restoration, the combination of photography, the Western-style printing press and the Japanese tradition of ukiyo-e created e-hagaki — colorful, beautiful picture postcards.
The website Old Tokyo displays a number of these postcards, including several of Frank Lloyd Wright’s Imperial Hotel interior and exterior views (even a bird’s-eye view that gives a sense size and mass of the building), a few with astounding colors.
Spend time looking at the other sections of the site — you’ll see the clash of Western and Asian architecture that appalled Wright when he visited Japan, and you’ll see of the architecture that enthralled him on his first visit.
There are also images of the first Imperial Hotel, built in 1890 and lost to fire in 1923.
And the site has a small selection of maps of Tokyo through the decades (1899 - 1949), particularly interesting is one of the fire damage from the Great Kanto Earthquake of 1923 — the disaster that Wright’s Imperial Hotel famously survived.
If you like this site, don’t forget the documentary Magnificent Obsession, a fantastic film about Wright’s work and successors in Japan, with its own collection of amazing images for Japan. The film’s site also has links for further reading and a list of links to related websites.