1.《The Determinants of Local Procurements by Japanese Foreign Affiliates : An Estimation of Factor Demand Function》，2007
2.《International Intrafirm Transfer of Management Technology by Japanese Multinational Corporations》，2006
3.《Reconsidering the Backward Vertical Linkages of Foreign Affiliates: Evidence from Japanese Multinationals》，2008
4.《How Do the Location Determinants of Vertical FDI and Horizontal FDI Differ? ―Evidence from Japanese Multinationals》，2008