 The Diet had only made some minor adjustments in the past, adding a few seats in urban areas and reducing some rural ones.Since 1964, voters in urban constituencies had filed 10 lawsuits seeking fairer distribution of Diet seats.The Supreme Court declared “constitutional” the 5.85-to-1 disparity in the 1986 election, but it ruled the 6.59-to-1 ratio in the 1992 balloting as being “in an unconstitutional state” - implying that it effectively violated the constitutionally guaranteed equality of voting rights.