Here are a list of links that will help supplement your learning of Ukiyo-e. Also, there is other relevant historical information for your pleasure. Please look through them!
The Art of Asia
Has a special section dedicated to Ukiyo-e, but also a historical timeline of art throughout Japan's history.
Ukiyo-e Prints at Lawrence University
Informational database of Ukiyo-e by Lawrence University.
Tokugawa Art and Culture
Website dedicated to the arts of Tokugawa Japan.
Fuji Arts
Huge Japanese art database for collectors and print enthusiasts.
Asia Society - Designed for Pleasure
Historical look at Ukiyo-e by the Asia Society and Museum along with the Japanese Art Society of America
Tokugawa Gallery
Online gallery dedicated to Ukiyo-e prints.
Asia for Educators
Huge list of links and resources dealing with Japan and Eastern Asia.
Man-Pai
English and Portuguese website dedicated to Ukiyo-e prints, in partnership with Society of Japanese Arts.
Asian Topics
Economical, historical, and cultural topics and information dealing with Tokugawa Japan
Ukiyo-E Gallery.com
An expansive gallery of Ukiyo-e images as well as a reference list, containing artist and historical information for every print.