Kōrei Shōgaisha Koyō Shien Kikō Shōgaisha Shokugyō Sōgō Sentā

• Jakunensei ninchishōsha no shūrō keizoku ni kansuru kenkyū
• Kigyō ni taisuru shōgaisha no shokuba teichaku shien no susumekata ni kansuru kenkyū
• Ōbei no shōgaisha koyō hōsei oyobi shisaku no dōkō to kadai
• Ōbei shokoku ni okeru shōgai nintei seido