Netsuke of the Meiji Period is an online exhibit from the Los Angeles County Museum, noted for the depth of its collection. (more). The György Ráth Museum and the Ferenc Hopp Museum also house a fine classic collection. (more). Today, netsuke carving is alive and well - see the Kiho Collection for one young master. If you would like to explore more sculpture for the hand, the International Netsuke Society has a good link list to many excellent contemporary netsuke artists.
Hihoken - Erotic Museums In Japan [NSFW, obviously]
Red-Haired Barbarians: The Dutch and Othe Foreigners in Nagasaki and Yokohama 1800-1865
Museums in Japan: 387 total. Many in English.