Wang, by your argument, then would Showa Day, in essence, be a recognition of Hirohito's inability to reign in his military cabinet lack of power before the war or acknowledgement of his war-continuation policies during?

Most everyone in Japan knows that Greenery Day is an indirect reference to Hirohito, and an acknowledgement of the Showa era. Will a renaming of the holiday make more people aware here? I don't think so. The question then becomes for whom is this day being renamed?