Chūgoku Kōgyō Gijutsu Shikenjo

• Kojimawan fukin kaiiki genchi chōsa shiryōshū
• Seto Naikai kaiteki na kankyō o motomete
• Tsūshō Sangyōshō, Kōgyō Gijutsuin, Chūgoku Kōgyō Gijutsu Shikenjo