' If you wanna fly
Come and take a ride
Take a space ride with the cowboy, baby "

See Yeahaa later

There is a lot more to it than just that. Hirohito had a role in which lead to many atrocities being committed, he himself however wasn't directly Responsible most of the atrocities. What I mean is this, its not deniable he knew many of which what was going on, but little to no evidence points to him ordering said actions to occur such was inhumane experiments, mass genocide, torture and so on. A lot of it had to do with lack of military discipline within the ranks of which lead to many Soldiers going to extremes in order to compete with one another especially military branches competing such as the Navy vs the Army.

The Military had such influence in the Japanese Government that Hirohito was little but a Puppet Figure in comparison to vast Military leaders. Sure Hirohito had the authority but the Military having the highest Status and influence, makes those who go against the Status Quo "Eliminated", An example being former Prime Minister Inukai Tsuyoshi whom himself was Assassinated after being an Obstacle to the Japanese Military as Inukai had disagreed with the Military invasion of Manchuria believing in Hirohito's positioning of honoring The Nine-Power Treaty of 1922 (Recognizing the Republic of China).

I would argue Hirohito's greatest responsibility was allowing the Military Generals and Military to go unchecked to do as they wished. Inaction on his end is what resulted in the atrocities Japan committed during WW2.