抄録
Restoring works of Takamatsu castle tower base were carried on. Restoration for historical structure with the value of cultural assets like Japanese castle requires keeping the authenticity of itself and reversible construction methods. On the works，in order to satisfy two requirements and also to improve the stability of the tower base masonry, geotechnical methods were applied. The measures for stabilization such as stabilization of lime and drainage for back fill, frame structure at the base stone were constructed based on results of some ground surveys and numerical analyses. These measures were very effective for the restoring of castle tower base masonry.
