Japan has many, many, many great eating experiences to offer. The sushi is fresh and delicious, the ramen is yummy, the green tea is comforting (and free with many meals!), the yaki-niku is fun and tasty, and the ethnic food we've tried here (Indian, Mexican) has been amazing too. Even the convenience-store food, which I'd expect to be a little stale and icky in the US, is usually great here. At first I wondered how an egg sandwich from a convenience store could be "confident" (as the label reads), but then I tasted this one, and then I understood. It deserved to be confident:
But. Not every food here is great. So let me pay a quick tribute to a couple of the most unpleasant eating experiences I've had here so far. Consider this a warning, and please refer to this if you ever decide to visit Japan, so you can make sure you do not try these things.
First, possibly the greenest drink ever, certainly the greenest one I've ever had, this Fanta variation looks a bit like it came straight out of a chemical experiment. And it tastes a bit like that, too. It's not quite as bad as Coca Cola's Beverly drink, but it's not particularly good, either.
And finally, the two worst dishes I've had here yet: daikon with pickled plum sauce, and "natto." The pickled plum sauce looks a bit like strawberry or raspberry flavor, but don't let it fool you! It's not at all sweet, in fact it tastes like something went very, very bad. And in the case of natto, which you can smell from a mile away, something really did go bad: it's actually fermented soy beans. Sometimes we'll walk down the street and smell the waft of natto coming from a local restaurant or yatai, and make a mental note to never, ever go there. Having said that, many Japanese people, and even some (cough, crazy!, cough) foreigners seem to enjoy it.

So if you come to Japan, be adventurous and try what you must, but don't say we didn't warn you!