Japan. Naikakufu. Seifu Kōhōshitsu

• Ai Chikyūhaku (Aichi Banpaku) ni kansuru seron chōsa
• Aruite kuraseru machizukuri ni kansuru seron chōsa
• Bunka ni kansuru senron chōsa
• Chian ni kansuru seron chōsa
• Chian ni kansuru seron chōsa
• Chikyū ondanka bōshi to raifu sutairu ni kansuru seron chōsa
• Chikyū ondanka taisaku ni kansuru seron chōsa
• Chikyū ondanka taisaku ni kansuru seron chōsa
• Daitoshiken ni kansuru seron chōsa
• Danjo kyōdō sankaku shakai ni kansuru seron chōsa
• Danjo kyōdō sankaku shakai ni kansuru seron chōsa
• Danjo kyōdō sankaku shakai ni kansuru seron chōsa