You might not like those plain or together, but I'm sure there has to be something that will taste better with something else. For example, I don't like fish, but I like sushi/sashimi. So maybe if you try it different ways, you'll find something good.
I find that eating stuff eventhough you dont like it in small portions helps overcoming that problem. It's important that you try to force yourself over the boundaries else you'll be stuck eating chicken or something the rest of your life. Aside from that, on my holiday one of my friends only could eat chicken. That resulted in visiting the Subway, Starbucks and Macdonalds foodchains a lot, but he did eat, so it's not an entirely lost cause!
well i'll say that you better come to japan first and have a taste,
pick in front of you... coz there 's a lot of good food here in japan.
it's only you to decide, da!