Earthen walls using compacted soils form a part of world heritage temples in Japan. Recently, natural soils are being re-evaluated as construction materials having capacities to accumulate humidity and heat. On the other hand, an earthen wall in Nishinomiya Shrine collapsed during the 1995 Hyogoken-Nanbu earthquake. Since the mechanical properties of lime-mixed soils that are used to construct earthen walls are not well understood, a series of unconfined compression tests was conducted in this study to reveal the effects of lime and water contents, curing time and compaction conditions. [This abstract is not included in the PDF]