@article{oai:nagoya.repo.nii.ac.jp:00011706, author = {江波, 大樹 and ENAMI, Hiroki and 中村, 俊夫 and NAKAMURA, Toshio and 小田, 寛貴 and ODA, Hirotaka and 丹生, 越子 and NIU, Etsuko and 山田, 哲也 and YAMADA, Tetsuya and 塚本, 敏夫 and TSUKAMOTO, Toshio}, journal = {名古屋大学加速器質量分析計業績報告書}, month = {Mar}, note = {Ages of archaeological sites related to iron manufacture, ages are usually determined using age-typed potteries or ^<14>C measurements on charcoals from the same stratum. Such indirect methods, however, are not valid in sites where pottery is absent or where charcoal deposits are mixed with materials of differing ages. In such cases, the ages of iron artifacts need to be measured directly. To determine the viability of AMS radiocarbon dating for iron artifacts, two case studies were conducted. The first involved samples of iron artifacts from a site of known age, i.e. the 'Gennaitouge' site in Otsu City, Shiga, Japan, which was active in the second half of the 7th century AD. The iron samples were heated with modern charcoal to determine if older ^<14>C characteristics could be preserved after such a process. AMS measurements of the heated samples yielded ^<14>C ages equivalent to modern charcoal. This result indicates that radiocarbon ages for iron artifacts should correspond to the final heating stage in the manufacturing process. In the second case study, AMS ^<14>C ages were determined for blacksmithing iron and charcoal samples from the 'Ninnjihaiji' site in Kashiba City, Nara, Japan. The ages of these materials were estimated at about the 7^