[Strength of specialized technology]

In 1970, the Building Materials Group commenced the importing of underground waterproofing materials (Cerinol-DS) from the Daiterman company (currently Saint-Gobain Weber) in Germany. In 1974, we established the Japan Cerinol waterproofing Associationwith the aim of providing not only waterproofing products but also specialized technology.

Cerinol-DS has been used by the domestic construction and civil engineering industries in Japan for more than 50 years, and the Japan Cerinol waterproofing Association is still active and continues to support waterproofing business in Japan.

Since then, we have also added an improved version of Cerinol-DS and a succession of even newer waterproofing materials, including a new range of modified asphalt-based spray waterproofing materials for underground waterproofing and new waterproofing methods for deep underground structures, plus we have developed new technologies for tapping and high-pressure water injection stoppage.

The Building Materials Group is divided into a construction materials unit, a building material unit, and an overseas promotion unit for developing technology and materials overseas. Each unit includes specialist engineers who are qualified in a wide range of construction and engineering fields including building construction, underground facilities, water, sewage and dams, and expressways.