Lonseal Corp. engages in the processing and sale of synthetic resins. It operates through the following segments: Processed Synthetic Resins and Real Estate Leasing. The Processed Synthetic Resins segment provides flooring and waterproof materials, wall covers, and interior decoration works. The Real Estate Leasing segment deals with the shopping center establishments. The company was founded in September 1928 and is headquartered in Tokyo, Japan.