Sangyō Rōdō Chōsajo. Shashi Hensan Iinkai

• "Rōmu jihō" "Rōdō shūhō" "Chingin jijō" 2000-gō sōmokuji
• Nijūisseiki rōdō shakai e no teigen
• Sangyō Rōdō Chōsajo no ayumi