In the IT Materials Related, Automotive, Medical and other fields, the High Performance Plastics Company produces and markets a wide range of products worldwide. For example, Sekisui holds the world's top share for the interlayer films which form the inner layer of automobile windshields. Sekisui's interlayer films help to create a safe and comfortable driving environment by reducing heat and noise and preventing windshields from shattering during accidents. The High Performance Plastics Company uses its advanced technologies to reduce the weight of plastics materials while at the same time increasing their strength, safety and variety.

Toward the aim of contributing to the quality of people's everyday lives, The High Performance Plastics Company expands the possibilities of plastic materials through its advanced resin mixing, molding and surface treatment technologies.

Urban Infrastructure and Environmental Products Company's (UIEP) activities are centered on the Water Environment Solutions Business: providing PVC pipe systems to meet the increasing demand for the establishment and replacement of water infrastructure systems all over the world. Especially in Asia, Europe and the United States, UIEP aims to offer full water infrastructure systems, from diagnosis and design to production, installation, and after-sales maintenance. In the area of pipe restoration, UIEP has developed the revolutionary SPR method that allows aged water and sewage pipes to be renewed without the need for excavation. UIEP also produces rain gutters and housing-facilities that include modular bathes and their related materials.

UIEP's other main businesses include FFU Functional Materials (composite railroad ties) and PVC sheets. In keeping with its environmental focus, UIEP is using recycled wood to produce building materials in its Wood Solutions Business.

Sekisui Heim is a line of high quality industrialized houses produced with Sekisui's advanced Unit Technology. Sekisui Heim houses are stylish and earthquake resistant, and are designed to be lived in comfortably for 60 years. One of Sekisui Heim's most innovative products is the "Zero utility cost" house which generates electricity through photovoltaic systems. Over 50,000 of these Zero utility cost houses have been sold in Japan. Unlike Sekisui's other 2 companies which have international operations, Housing Company sells and markets its houses exclusively in the Japanese domestic market.