Yoshio Yamashita

• Enkai-shū oyobi Kokuryū-shū-san no komugi narabini raimugi no kokuryū kenkyū
• Kokuryūkō oyobi sono shiryū no kōun
• Roryō Kokuryū-shū no chikugyō
• Roryō Kokuryū-shū no chikusangyō