The Big Debate: Will Japan's new conspiracy crimes over reach?
Of course they will. Conspiracy is just too easy to allege and nearly impossible to disprove. Language added to the bill stating that "legitimate activities of labor unions and other organizations will not be prevented" doesn't accomplish anything because those who would attack a union would have a very limited view of the "legitimate activities" of a union.
And if you think I'm being a little paranoid just check out how the US feds use conspiracy, or how it's added as a separate crime with no separate act in Virginia, or go read some of the history of the abuse of RICO. Or for paranoia purely related to Japan read this article.