The purpose of this study is to clarify the plans that Japanese legislature and administration showed much interest in and considered highly important among all plans made by the central government from 1950 to 2009.

In this study, the interest in plans is analyzed through the content of Diet minutes and the Prime Minister's Diet discourse.

The results are as follows: a) There were three types of high-interest plans-economic plan type (economic plans and the Large-boned Policies (economic and fiscal management policies)), national land plan type (the Comprehensive National Development Plans and the Plan for Remodeling the Japanese Archipelago), and defense plan type (the Defense Program and the National Defense Program Guidelines); b) After the latter half of the 1990s, the number of administrative plans started to increase, yet high-interest plans, except the Large-boned Policies, ceased to exist.