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Apart from the Subway attacks in 94, there were severall other terrorist attacks that the Doomsday Cult known as Aum Shinrikyo had planned to execute.
In fact, on May 5th of that same year, another biochemical bomb was found in Shinjuku Station that had enough toxic gas to killed up to 10,000 people if it had successfully gone off.
So, in case that this referenced attack, along with others, actually occurred along with the events of OTL's gas attacked, what would would be the economic, societal, and political fallout if the Aum Shinrikyo doomsday cult killed far more people?
Could Japan fall to authoritarianism via Ultra-Nationalist parties?