樋口隆行 (Takayuki Higuchi)
Denka Co., Ltd
Doctors degree in Material Engineering from Tokyo Institute of Technology.
He has more than 20 years of experience for cement, concrete and construction chemicals, especially for the special cement additives for Concrete such as Tunnel Shotcrete, Quick hardening, High strength, Expansion and Waterproofing. He has more than 30 patents.