The Illegitimate Japanese Gov’t

So, lo-and-behold, the Japanese courts have finally come out from hiding and told the politicians to get their shit together.  It’s about damn time!!  For those of you not up on the politics:
The Japanese high courts in two different prefectures have ruled that voter disparity is too high to validate the results of last year’s general elections.

(More can be found HERE.)

This BS has been going on since the Lower House election of 2009!  The Supreme court later ruled decided that election was unconstitutional due to the extreme disparities, but let them off with a warning.  Yeah, you read that right: The election was unconstitutional, but the Supreme court let them off with a warning!!  Oh sure, it made them promise to drive the speed limit fix the system but…  Hey, you know how that goes, right?

Well, this time, the local courts have decided to show some “ball sac” and tell the feds that they are full of it.  Now, the big question is, what will the Supreme Court do?  Toe the line and tell the boys to play nice while smacking down the local courts, or call a spade a spade by forcing change on the government.

Question:  Has there ever been a case in which a country’s Supreme Court ruled an election invalid (in a Non-tyrannical government) and if so, what happened?

Let’s get some opinions in the comment section!  (That was a joke, since I’m the only one who reads this site!!)