あらい Company Profile

Leave soil contamination surveys and mortar injection to us.

Arai Co., Ltd. is a company that conducts soil contamination surveys and mortar injection work. We provide one-stop services for soil contamination sampling and the replacement of contaminated soil with clean sand. Additionally, Arai Co., Ltd., with over 30 years of experience and achievements, has its stone wall mortar injection method certified as a new technology (NETIS) by the Ministry of Land, Infrastructure, Transport and Tourism. By injecting mortar (a mixture of cement, sand, and water) under mechanical pressure through the gaps between stones, this method contributes to the "reinforcement," "eradication of weeds," "improvement of drainage management," and "enhancement of aesthetics" of stone walls, thereby alleviating the concerns and burdens of owners managing stone masonry.