Abstract
The following outline summarizes the major architectural tools of the Jomon period through the results of an investigation of unearthed 4，000 year –old structural members and an experiment to restore them.
(1) This architecture was characterized by high –raised–floors.
(2) The structural members of this “high-raised –floor architecture ” were joined with mortises，tenons，and other specialties of joinery.
(3) Chestnut trees were a commonly used architectural material.
(4) The structural members of the time seemed to have been worked with stone axes and adzes of ground serpentine.
(5) Large stone axes were the major tools used to fell timber.
(6) Large stone axes， wooden wedges， and large stone adzes were the major tools used for lumbering.
(7) Stone axes，adzes，and chisels were the main tools used to work structural members.
(8) A large number of people were needed to frame a structure， the major components of which were enormous posts.
(9) The latest restoration experiment clarified that， in the Jomon period， stone chisels played a major role in working structural members.
