Nihon Sangyō Kikai Kōgyōkai

• Heisei 3-nendo minshuka ni ikōsuru kyōsan shokoku e no kankyō hozen taisaku kyōryoku no chōsa kenkyū
• Heisei 4-nendo minshuka ni ikōsuru kyōsan shokoku e no kankyō hozen taisaku kyōryoku no chōsa kenkyū (II)