Question

who created the first rasengan
ashura or minato​

Answer 1

Answer:

Ah, I see you are a man of culture as well.

It was Minato, it was his own jutsu that he  passed on to his teacher, Jiraya, who then passed it down to Minato's son Naruto

Although Ashura did make something similar to it first, it wasn't a perfecft rasengan, hence Minato was the first to make Rasengan.

Answer 2

Answer:

yes,Ashura was the creator of Rasengan .

Explanation:

In fact, he had already created version of it- multiple Rasengans