This site contains information about kofuns (a kofun is a tomb
with mound of ancient Japan, something like a tumulus) in Gunma
prefecture, which is located about 100 to 200 km northwest of
Tokyo. This site is written in Japanese, and no versions in other
languages are available now.
If somebody needs the English version,please let the author (Eiji Wakimoto) know it by e-mail (JBB01432@nifty.ne.jp).
Although I cannot promise anything, I think I will try to make the English version if requested by many persons.
See also ...
About the romanization method of Japanese words in this web site