|Budget Amount *help
¥2,400,000 (Direct Cost : ¥2,400,000)
Fiscal Year 1999 : ¥800,000 (Direct Cost : ¥800,000)
Fiscal Year 1998 : ¥600,000 (Direct Cost : ¥600,000)
Fiscal Year 1997 : ¥1,000,000 (Direct Cost : ¥1,000,000)
As a result of the investigations from 1997 to 1999, potteries named Hajiki and the fragment of iron tool were found in the Shitomaki site and the Ohatazuka tumulus, and it was confirmed that the Ohatazuka tumulus is a circular tumulus with a mound of diameters of twenty meters, and double ditches surrounding around the mound. In the double ditches of the Ohatazuka tumulus, the inner ditch is round, the outer one is square. This is very unique. The section of the ditches of the Ohatazuka tumulus bears a close resemblance to the one found in the Shitomaki site.
According to the chronological examinations of the pottery (Hajiki) from the ditch and the pit dwellings, it is assumed that the mansion house of the Shitomaki site No. 1 was deserted in the middle of the third century. On the other hand, it is assumed that the Ohatazuka tumulus was constructed in the middle of the third century A.D.; I.e. the earlier stage of early Kofun age. The Ohatazuka tumulus and the Shitomaki site No. 1 are almost the same in their period and scale.
Judging from the above, the Ohatazuka tumulus was one of the chieftain tombs of the local region. The Ohatazuka tumulus and the Shitomaki site No. 1 are thought to have had close relationships with each other. We presume that the person buried in the Ohatazuka tumulus had direct bearings on the Shitomaki site No. 1.
By the identification of carbonized wood remains and seeds, and by the phytolith analysis of deposits on the Shitomaki site, we found it possible to restore the ancient environment.
In addition, this report offered important data which are concerned with the date of beginning of Kofun age.
It is hoped that the excavation of the inside of the Shitomaki site No. 2 is carried out in the near future. The detailed relationships of the Shitomaki site No. 1, No. 2 and the Ohatazuka tumulus will be clarified in future investigations.