This paper provides the diachronic view of the Japanese vernacular house from the late medieval to the early modern period. 'Hottate-bashira' is a post with fixed end struck into ground and 'Munamochi-bashira' is a post which supports a ridge beam called 'Munagi'. The archetype of the vernacular house had 'Hottate-bashira' and "Munamochi-bashira'; afterwards, changed into the house with posts on stone bases called 'Ishizue'. It is concluded that the major prototype of Japanese early modern vernacular house has three posts in span direction with fixed end struck into ground and the middle post supports the ridge beam.
