A study of Famine and Epidemic in the ancient Japan with Spatio-temporal Information Science

在日本古代，饥荒总是发生在旧历的夏天。在这项研究中，我估计了损害的程度。隐岐之国的人口从常干八年/九年（866-867年）的30%左右减少了约50%。所有这些损害并不能掩盖整个日本，但它必须是它的社区实际上受到严重伤害。古代社会根本不是一个田园农业社会，而是一个流动性高度严重的社会。

In the Japanese ancient times, famine occurred by all means in the summer of the old calendar. In this study, I estimated degree of the damage. In Oki no Kuni, it is estimated that population decreased around 50% from about 30% for Jogan eight years/nine years (866-867) by the epidemic. All these damage does not cover up the Japanese whole, but it must be it in fact for the community to be severely wounding. The ancient society was not an at all pastoral agrarian society, and it was high severe society of the fluidity.