Vote-value disparities have widened further in both houses of the Diet.
It is politically difficult to dissolve the lower house
when there remains a disparity in the value of votes,
with a single vote in some constituencies being equal to three in others,
which the Supreme Court has ruled unconstitutional.
Diet = 国会
lower house = 衆議院
dissolve = 解散
single vote = 一票の力
constituencies = 有権者、選挙区
unconstitutional = 違法