本文利用日本1980年完全消除部門內交易後的產業關聯乘數γ△ij，遵循奧地利經濟學者的生產結構觀念，構建日本的產業系統並從事中日韓三國的比較，根據產業系統的比較本文計列出13項重要的發現，俾供各界參考。

In This paper, the author uses Japanese 1980 interindustrial multipliers γ△ij compiled by the extremely net output method, following the production structure concept of Austrian economists, to form Japanese industrial systems, and compare them with those of Taiwan and South Korea. Based on the comparison of industrial systems, thirteen important findings were listed. The above findings can be served as readers’ references.