Just one punch is all it'll take for Saitama to beat Goku. ... However, Saitama's strength is often undermined by fans when compared to Goku. For instance, yes, Goku is a Saiyan, an alien warrior race, who has the ability to enhance his strength by transforming into a Super Saiyan....
but he suffered a head injury when he landed, causing a pretty bad case of amnesia. Goku forgot all about his mission and grew up believing himself to be a member of the human race rather than an invader trying to overthrow it. Now, he'll...