Tataki, an earthen floor crafted by blending beaten soil with lime and bittern and solidifying it through beating, is a hallmark of Japanese traditional architecture, though its prevalence has waned with time. Historically, Tataki served as a method for ground enhancement until the widespread adoption of cement in construction. The strength evolution within Tataki mirrors the pattern observed in materials comprising soil and slaked lime. Consequently, achieving adequate strength becomes challenging when the soil used for Tataki exhibits acidity. To address this, the present study investigates the efficacy of employing anionic surfactant in Tataki made of Kaolin clay to bolster its strength. Experimental outcomes involving materials infused with anionic surfactant are juxtaposed against those utilizing the original Tataki material, along with materials featuring nonionic surfactant or acidity regulator. Significantly, the research reveals that Tataki's strength matures during a mid or long-term curing phase. This finding underscores the potential of anionic surfactants to enhance Tataki's structural integrity, offering insights for its continued use in contemporary architectural contexts.