The Smithsonian website on Asian art has a vast supply of pictures and information about East Asia.
From the main site
http://www.asia.si.edu/collections/
you can choose from the right hand vertical menu to choose between a variety of civilizations, including Chinese art, Japanese art, and Korean art. The Chinese collection has over 10,000 artifacts starting with Neolithic times. It includes artifacts from the Shang, Zhou, and Tang dynasties. The Japanese art collection has more than 11,000 artifacts including Buddhist paintings, sculpture, calligraphy, ceramics, and tea-ceremony objects. The Korean collection has over 500 artifacts including celadon ceramics, and objects from the Three Kingdoms period, the Goryeo dynasty and the Joseon period.
I like how the collections can be browsed in a variety of ways, including a "collection highlights" view.
In addition to all this information, there is a section specifically for educators.
http://www.asia.si.edu/explore/teacherResources.asp
This teacher resource section has an option to sign up for resources and programs, online guides to the art in the collections, classroom activities and lesson plans, and a template for a visual identity book that students can create. I plan to use this in my classroom as it is something I know that my students would enjoy creating. I plan to have them create this visual identity book to illustrate aspects of the Japanese culture for California standard 7.5.
I signed up for updates and resources, and also subscribed to the podcasts through iTunes given by a variety of lecturers and curators. I plan to use this site to learn more about Asian history, art, and culture, and to share these things with my students as it fits with my standards.