Takafuta-Tsukatani Mounded Tomb, Jinseki-kōgen Town, Hiroshima Prefecture

Takafuta-Tsukatani mounded tomb (kofun) was located in Jinseki-kōgen Town, Hiroshima Prefecture. However, immediately after World War II the site was reclaimed as farmland and the mound disappeared. In 2010, some of the finds unearthed by the landowner of the tomb were donated to Jinseki-kōgen Town. Furthermore, other relics from the Takafuta-Tsukatani mounded tomb were also held at the Hiroshima Prefectural Fuchū High School, but are now in the possession of the Hiroshima Prefectural Museum of History. In this article, all unearthed finds are presented in their entirety. Takafuta-Tsukatani mounded tomb was built during the Late Kofun period (latter half of the 6th century A.D.). Many objects were unearthed, including iron swords, a hand guard of a sword (tsuba), horse bits (kutsuwa), stirrups (abumi), beads of necklaces, Haji ware (hajiki), and Sue ware (sueki). In particular, horse bits with gourd-shaped iron rings (hisagogata kanjō kagami itatsuki kutsuwa) are characteristic for mounded tombs in the Kibi region (ancient province consisting of Okayama Prefecture and the eastern part of Hiroshima Prefecture). In the latter half of the 6th century the first iron manufacture sites appeared in the Bingo region (eastern part of Hiroshima Prefecture). It is highly probable that the person buried in the Takafuta-Tsukatani mounded tomb was involved in horse harness and trappings production, iron manufacture and blacksmithing unique to the Kibi region.今回の資料紹介は2018・2019年度大学院文学研究科考古学研究室の資料実習授業における遺物観察･実測、写真撮影をもとにし、神石高原町の委託研究費を一部使用した

Topographical Survey of the Chōja Sukumozuka Mounded Tomb No.1 in Saijō, Higashi-Hiroshima City

The Chōja Sukumozuka mounded tomb No.1 is located in Saijō-chō, Higashi-Hiroshima City, and believed to be a scallop-shaped mounded tomb Hiroshima Prefecture. Because the northeastern part of Hiroshima Prefecture has many scallop-shaped mounded tombs, the Chōja Sukumozuka mounded tomb No.1 has been thought to be similar to them. However, according to our recent research, there is a possibility that the shape and background of Chōja Sukumozuka mounded tomb No.1 differ from those of other northeastern scallop-shaped mounds. For this reason, as part of “Field Practice in Archaeology A and B” for the archaeology majors at the Hiroshima University School of Letters, we conducted a topographical survey of this mound with the aim of clarifying its scale, shape, and date of construction in August and September, 2017. The results of this survey indicated that the total length of the Chōja Sukumozuka mounded tomb No.1 is 60.0m; 19.5m for the square front part and 40.5m the round rear portion. In addition, various kinds of haniwa fragments of cylindrical, morning glory-shaped, sunshade-shaped and house-shaped ones were collected from the mound. Features of its cylindrical haniwa indicate that this mound was constructed between the end of the 4th century AD and the beginning of the 5th century AD. Based on the results of this survey, the shape of the Chōja Sukumozuka mounded tomb No.1 is a middle form of a keyhole-shaped and a scallop-shaped mound; therefore, the shape is different from those of the scallop-shaped mounds in the northeastern part of Hiroshima Prefecture and the Kinai Region, which were constructed in the same phase. In conclusion, we can assume that Chōja Sukumozuka mounded tomb No.1 and Maruyama Shrine mounded tomb No.1 have a different background from other areas which have scallop-shaped mound tombs, Therefore, the scallop-shaped mounded tombs in the Saijō basin were adopted as a local, unique mound shape before the Mitsujō mounded tomb No.1 was constructed

Evaluation of single liquid primers with organic sulfur compound for bonding between indirect composite material and silver-palladium-copper-gold alloy

The purpose of this study was to evaluate the effect of primers on bonding between a silver-palladium-copper-gold alloy and an indirect composite material. Cast disks were air-abraded with alumina, conditioned with one of five primers (Alloy Primer, Luna-Wing Primer, Metal Primer II, Metaltite, M.L. Primer), and bonded with a light-activated indirect composite. Shear bond strengths were determined after 20,000 times of thermocycling. The results showed that four of the primers, except the Luna-Wing Primer, were effective in enhancing the bond strength as compared with the unprimed control group. Of these four primers, Alloy Primer, Metal Primer II, and M.L. Primer exhibited significantly greater bond strengths. It can be concluded that the effectiveness of primers varies considerably according to the organic sulfur compounds added to the solvent, and that care must be taken in selecting priming agents for bonding the composite material and the silver-palladium-copper-gold alloy