noun
reapportionment of Diet seats
A technical political term referring to the adjustment of the number of seats allocated to electoral districts in Japan's National Diet, typically to correct vote-value disparities.
最高裁は、一票の格差を是正するため、定数是正を求めた。
The Supreme Court called for reapportionment of Diet seats to correct the disparity in vote values.
Refers to the vote-value disparity itself, which 定数是正 aims to correct.
Compound of 定数 (fixed number, quota) and 是正 (correction, rectification).