In case you are interested in haniwa and kofun (Japanese burial mounds), these links might be of interest:
Sakai City's site
Charles Keally's Kofun Culture page
Kazumasa Ozawa's page about kofun
A page that shows what kofun look like from the air and ground
Abstracts from the Japanese Archaeological Association
A concise article about haniwa by the Cleveland Museum of Art