1. 1) Nansai, K., Moriguchi, Y., Tohno, S., (2002), Embodied Energy and Emission Intensity Data for Japan Using Input-Output Tables, Center for Global Environmental Research, CGER-D031-2002.
2. 2) Ministry of Internal Affairs and Communications, 1985, 1990, 1995 and 2000 Input-Output Tables for Japan (in Japanese).
3. 3) Statistics Bureau, Ministry of Internal Affairs and Communications (2003), Japan Statistical Yearbook (in Japanese).
4. 4) Japan Civil Aviation Promotion Foundation, (2000), Civil Aviation in Japan.
5. 5) The Japan Port and Harbor Association, (2000), Harbors in Japan.