During Aug-Sept 2000 with Professor Takashi Tatsumi and his research group at Yokohama National University, Yokohama; & with Dr. Masao Yoshimoto & Mr. Toshihiko Masuda at Kanagawa Science Park, Mizunokchi, Japan. Topic: Development of Catalysts based on Silica-Alumina and Zeolites for Hydrocracking of Vacuum Gas oil.
During July-Aug 2002 with Professor Sachio Asaoka at the University of Kitakyushu, Japan. Topic: Development of Catalysts based on Titania-Alumina and Zeolite for Deep HDS of Heavy oil.
During July-Aug 2003 with Professor Sachio Asaoka and his research group at the University of Kitakyushu, Japan. Topic: Catalytic Evaluation of Catalysts for Hydrodesulfurization and Hydrocracking of thiophenic Sulfur Compounds and Vacuum Gas Oils.
During August 2004 with Mr. Ishikawa at Nippon Research Institute Co. Ltd. Yokohama, Japan. Topic: Noval Catalysts Preparation for Transalkylation.
During July-August 2005, Visiting Scholar at the National Center for Excellence in Analytical Chemistry of the University of Sindh, Jamshoro, Pakistan.