It is the fourth hokage's technique....
one of the class S techniques which are very powerful....
it can damage all the internal organs if you are being hit by this powerful technique...
only master jiraiya and the fourth hokage can use this technique
and then it was being taught to naruto...
This technique can be useful if you are battling the akatsuki...
chidori is no match for this technique.. why because
chidori uses it's speed to attack and then it would disappear while rasengan would disappear if it damages all your system...