Re: If you can read Japanese, can you read Chinese?
To that (often asked) question, one will simply answer : yes and ... no.
Yes, when it comes to WORDS and simple (short) sentences. A good comparison would be to consider NUMBERS. Writing any given number (5, 32, 291, 68.914 ...) can be read and understood in any given language (provided the use of so-called Arabic numbers is common), as numbers can be taken as ideograms, like kanji/hanzi.
Japanese and Chinese, who share those same ideograms (except a few rare cases of "Japanese made" ideograms and different simplification of the same ideogram), will then undertand easily basic concepts like "water, sun, man, female, society" and many others.
No, when it comes to complicated concepts, articulated sentences, because Chinese and Japanese each belong to a different group of language, which is syntactically different (word order in the sentence is different), a little like English and German (though both belong to the same language group).
This being said, Chinese and Japanese will still be able to read the same old Chinese Classical Texts (like Confucius, Lao Zi etc), but they will read them in a different way.
So, a final answer to : If you can read Japanese, can you read Chinese ? has to be : not quite, but it will help you .
"Les langages, à mon gré, sont comme les gouvernements, les plus parfaits sont ceux où il y a le moins d'arbitraire". (Voltaire)