Computer scientific analysis on the ancient kingdom, called Yamatai-koku, based on properties of a set of the oldest Keyhole-shaped ancient tomb mounds

最近几天，新闻媒体对日本古代史的一种理解与日俱增：概括起来，锁眼墓丘始建于公元3世纪中叶的山梨国时期。这个想法可能是通过直觉和非数字的感觉而不是通过科学推理来引入的。本研究旨在以定量分析的方式验证这一认识。首先，选出了一套最古老的钥匙孔陵墓。则从集合中统计地提取属性值。接下来，一份中国古代文件中出现的日本岛屿上30个国家的人口，包括山台国度，被列出以计算其分布的另一个属性值(分维)，假设符合幂定律。最后，通过对上述两个属性值的定量分析和计算机模拟，得到了较为合理的结果。

In recent days, a kind of understanding to Japanese ancient history has been growing in the news media: To summarize, Keyhole tomb mounds began to be built in the time of the ancient kingdom, Yamatai-koku, in the mid-third century. This idea might be introduced by an intuitive and non-numerical sense rather than by scientific reasoning. This research project aims at verifying such understanding in a quantitative way of analysis. First, a set of the oldest Keyhole tombs have been selected. Then an attribute value has statistically been extracted from the set. Next, populations of 30 countries in Japanese islands, including Yamatai-koku, appeared in an ancient Chinese document have been listed to compute another attribute value (fractal dimension) of their distribution, assumed to be with the power law. Finally a reasonable result has been obtained both by a quantitative analysis on the above two attribute values and by computer simulations.