Study on the correlation of the chief's tombs and the general people's tombs of the Kofun Period in the Ariake Sea and the Yatsushiro Sea coast aria located on the western Kyushu Island, Japan

我们调查和分析了1949/1950年间在熊本县麻生地区的长城-祖卡墓丘(钥匙孔形状的墓丘)挖掘中发现的文物，这是库芬酋长的陵墓之一。因此，我们清楚地证明长谷祖卡墓建于公元5世纪的1/3。此外，我们还发掘了麻生地区平原山墓群的6号土丘，表明它建于公元4世纪3/3和5世纪的1/3，为圆形墓丘，长约30米。此外，我们还收集了由一般人的墓葬之一的阿马库萨砂岩制成的墓葬，并提出了从石器到走廊式石室与板墙(Sekisho)的假说。

We investigated and analyzed artifacts discovered in the 1949/1950-year excavation of Nagame-zuka tumulus (keyhole-shaped burial mound), which is located on Aso Area of Kumamoto Prefecture and one of the chief's tombs of the Kofun Preod. Consequently, we showed clearly that Nagame-zuka tumulus was built in the one-third of the 5th century.Moreover, we excavated No.6 mound of the Hirabaru Mounded Tomb Group in Aso Area, and showed that it was built during the three-third of the 4th century and the one-third of the 5th century, and that it is circular-shaped burial mound of about 30m.Furthermore, we collected cists made from Amakusa sandstone which is one of the general people's tombs, and showed the hypothesis of changing from a cist to a corridor-style stone chamber with slab partitions (Sekisho).