"H" in Japanese is most of the time normal, except when it's "hi", "hya", "hyu", "hye" or "hyo". When it's in this case, then the H is pronounced with a slight "hiss" in the back of the throat.
The Japanese "J" is pronounced like a hard J, like in "job" or "Jason". You may have noticed that there are two sets in each kana chart. Well, the explanation to that is that the second set is pronounced even harder than the first set.
Vowels are very important to know how to pronounce in Japanese. Here's a list.
a: "ah"
i: "ee"
u: "oo"
e: "eh"
o: "oh"
Notice they aren't pronounced like they are, sometimes, in English. They're pronounced equivalent to their actual phonetic sound. "A" is pronounced like "papa", "i" is prounounced like "key". "u" like in "cool", "e" like in "cake", and "o" like in "hope". Also, notice the order they appear in. In English, it's "AEIOU", but in Japanese, it's "AIUEO". Note: In Japanese, "Y" is always a consonant.
That's all for now. If there's anything else anyone thinks I should add to this, please, e-mail me or AIM me @ TomoyoFan18 . Arigatou. :)