Tsujii Takashi=Tsutsumi SeijiAkimasa Kanno, Awazu, Norio, Matsumoto, Ken'ichi, Masashi Miura, Akio Yamaguchi, Kazuko Koike · First published 2016Open the Tome
Kakunin keiji seisaku hanzaigaku yōgo 250Masaoki Ishikawa, Akio Yamaguchi · First published 2010Open the Tome
Amerika Gasshūkoku ni okeru shūshinkei jukeisha shogūjō no shomondaiAkio Yamaguchi · First published 1999Open the Tome
