Shakai Shisō Taisaku Chōsakai

• Kabushiki Kaisha Ōsaka Kikai Kōsakujo ni okeru rōdō sōgi no keika gaiyō
• Saikin ni okeru waga kuni rōdō dantai no setsuritsu kaisan ni kansuru kobetsuteki chōsa shiryō
• Shōwa jūichinenjū ni okeru sayoku shakai undō gaiyō narabini shakai undō kankeisha shōsoku ippan
• Tōkyō-shi Denkikyoku jūgyōin no rōdō sōgi ni kansuru keika gaiyō