1. Ministry of International Trade and Industry, Annual Report on Small Enterprises (Tokyo: MITI, 1984) [in Japanese], p. 401
2. Cole Robert E., Yakushiji Taizo, The American and Japanese Auto Industries in Transition (Ann Arbor, MI: Center for Japanese Studies, University of Michigan, 1984), p. 151.
3. Ministry of International Trade and Industry, White Paper on Small and Medium Enterprises in Japan (Tokyo: MITI, 1987), pp. 36–37.