Do you think the chemicals are bad for your health?
Needless to say, it depends on what you believe. Surely, the Health Ministration makes sure that chemicals are used only within the amount and timing that wouldn't affect your health, and imported fruits are to strictly follow Japanese import regulations.
But some people think you never know for sure what is good and what isn't. That's why every country has organic products and certain fair trade products. It's up to the person to choose what to eat and the way to eat it. Personally, I try to buy organic fruits and eat the skin.
Actually, another thing is that, for example, things like strings of banana peal or tangarine peal were believed to be bad for your digestion. This was probably true back in the days when the Japanese in general couldn't get enough nutrition to keep their bodies healthy enough. But nowadays, as far as health is concerned, the main concern is the chemicals.
Also just so that you'd know, one of the reasons Japanese fruits look perfect is because they handled with extra care. A lot of man-power goes into the orchards and many ill-shaped ones are sorted away, which is also the reason for the high prices of these fruits. So at least it's not the chemicals that are making them perfect.