**** 古墳:KOFUN;old huge tomb of Japan ****
ICOMOS(International Council on Monuments and Sites) recommend Japanese KOFUN as cultural heritage to UNESCO.
I listed KOFUN in the list of "Not known to the world" before the news.
We have over 16 thousands of KOFUNs in Japan which are made in 3 to 7th centuries.
The largest KOFUN has larger footprint then the largest Pyramid in Egypt.
FYI, there are some(less than 20) small KOFUNs in south west Korean peninsula.