It is a surprise that Japanese import dependence (import to GNP ratio)
has declined by half to less than 6 percent in 1994 since early 1950'
s. This low import dependence symbolized the closedness of the Japanes
e market. The present paper attempts to explore the reasons of decreas
ed import dependence. One reason was 'the principle of minimum interme
diate goods import' which was enforced since the war time. According t
o structural changes in production and export, the imports of intermed
iate goods have changed their share from primary raw materials to proc
essed materials and then to parts, components and other capital goods.
This resulted in lower import dependence as a whole, since larger-imp
ort-content-industries have relatively declined, while smaller-import-
content-industries have relatively expanded. Other important character
istics of the Japanese import behavior are identified and analysed.