Japan. Jichishō. Chiiki Seisakuka

• Chihō kōkyō dantai no kigyō yūchi shisaku no genjō to zaiseimen kara mita mondaiten ni kansuru chōsa
• Teijūken ni okeru kōkyō kōtsū kikan seibi ni atatte no jichitai shusshi hōjin tō no yakuwari oyobi sono chihō zaisei ni ataeru eikyō ni kansuru chōsa