Chūō Shakai Hoken Iryō Kyōgikai

• Heisei 5-nen 6-gatsu iryō keizai jittai chōsa (iryō kikan chōsa) hōkoku
• Heisei 5-nen 6-gatsu iryō keizai jittai chōsa (iryō kikan chōsa) no gaikyō
• Heisei 9-nen 9-gatsu iryō keizai jittai chōsa (iryō kikan tō chōsa) hōkoku