Niigata-ken Suisan Kaiyō Kenkyūjo

• "Nahotoka Gō" jūyu ryūshutsu jiko ni kakawaru enganʼiki kankyō eikyō chōsa hōkokusho
• Akisake shigen riyō haibun tekiseika jigyō hōkokusho
• Sōritsu hyakushūnen kinenshi