抄録
Land development in South West area of Mt.Fuji in ancient times expanded,
related with the characteristic geological environment. As a component of the environment,
mountain spring water can be pointed out.
For example, Kanzo site started forming the settlement around spring water pond in a
stratified society, which began after the construction of Marugaito login tumulus．
In addition, a water supply facility was found in Kinogyoji site in the 7th century.
This paper will introduce how people secured water in a volcanic zone, which had direct
impacts by lava.
