Japan. Kōsei Rōdōshō

• "Rōdō keiyaku rōdō jikan ni tsuite no jittai oyobi rōshi no ishiki" chōsa kenkyū hōkokusho
• Chūgoku no Nikkei kigyō ga chokumenshita mondai to taisho jirei
• Daijūgo kaisei Nihon yakkyokuhō
• Daijūgo kaisei Nihon yakkyokuhō
• Daijūroku kaisei Nihon yakkyokuhō
• Daijūyon kaisei Nihon yakkyokuhō
• Genbakushō chōsa kenkyū jigyō hōkokusho
• Hataraku mono o sodateru kankyō no saikōchiku
• Ishiwatasoku handobukku
• Jinzai taikoku no sōzō ni muketa kyaria kankei jōhō no kaiji no arikata tō ni kansuru kenkyūkai chōsa kekka
• Jizoku kanō na anshindekiru nenkin seido no kōchiku ni mukete
• Jōji rōdōsha o shiyōshinai chūshō jigyōshu tō ni kakawaru saigai no jittai oyobi saigai ni kakawaru kōteki hoken no tekiyō ni kansuru ishiki chōsa kenkyū hōkokusho