Shin Nihon Yūgen Sekinin Kansa Hōjin
Amerika oyobi igirisu ni okeru shakai hoshō seido to kaikei kensa ni kansuru chōsa kenkyū- Heisei 21-nendo chikyū kankyō tekiōgata, honpō gijutsu katsuyōgata sangyō butsuryū infura seibi tō jigyō
- Kaisei Chosakukenhō no shikō jōkyō tō ni kansuru chōsa kenkyū hōkokusho
- Yūka shōken hōkokusho no sakusei jitsumu