[Qayin]

For natto, you got to try it at least 3-4 times before you get use to it. It's like when someone (such as me) try green tea without sugar for the first time in Japan (I remember it's Itoen's):

"Hey, why this drink got so much leaves' smell!?" At first it's very difficult to swallow, but after 2-3 bottles, "wow I like it"

Just try it, it may be easier if you buy the one that include shoyu inside the package, I think shoyu make it easier to eat.