Purekku Kenkyūjo
Dōro jigyō ni okeru keikan ni kansuru kankyō eikyō hyōka chōsa- Gairai arirui tō shinnyū bōshi taisaku jōhō shūshū gyōmu hōkokusho
- Heisei 23-nendo Tōhoku chihō Taiheiyō engan chiiki shizen jōkyo tō haaku gyōmu hōkokusho
- Satochi satoyama shizen shigen kanri moderu kentō chōsa itaku gyōmu hōkokusho
- Seibutsu tayōsei kokumin undō kanren jigyō "zenkoku shizen ikimono meguri sutanpu rarī" jisshi gyōmu hōkokusho