Kumiai Chemical Industry Co., Ltd. is a Japanese company primarily engaged in the development, manufacturing, and sale of agricultural chemicals, including herbicides, insecticides, fungicides, and plant growth regulators. The company offers a broad portfolio of crop protection products essential for modern agriculture, alongside fine chemicals and pharmaceuticals, leveraging its expertise in organic synthesis. Its product lineup includes proprietary and innovative crop protection solutions distributed to over 50 countries worldwide. Kumiai operates in three main segments: Chemical products, Lease, and Others, with the chemical products segment accounting for nearly all its revenue and operating profit. Founded in 1963 and headquartered in Tokyo, Japan, Kumiai Chemical emphasizes food security and environmental conservation through its agrochemical products.
Recent major changes include strengthening its production system for bismaleimides (BMIs) used in semiconductors, marked by the completion of a new plant by its subsidiary K-I Chemical. In 2024 and 2025, Kumiai has actively engaged in legal proceedings related to patent infringements of its pyroxasulfone products in China and Australia, reinforcing its intellectual property. The company expanded its business through acquiring a 65% stake in GRA Inc., enhancing its market reach and product offerings. It also launched sales of semiconductor-grade high-purity carbonyl sulfide (COS) gas, signaling a strategic diversification into cutting-edge semiconductor materials. Despite revenue growth in 2025, the company experienced a profit decline and revised its earnings forecasts accordingly, reflecting shifting market conditions and operational adjustments. Kumiai remains committed to innovation and sustainable agricultural solutions within Japan and internationally.