|Hiragama normal chart|
Hiragama "deaf sounds" chart
HIRAGANA:This is the basic script. It represents every sound in the Japanese language. You can, theoretically, write using only using Hiragana. However because in Japanese spaces between words do not exist writing only using Hiragama will create nearly indescriptible text. Here is table Hiragama characters compare to the English ones.Using this table, the Japanese word for "Hiragama" is written as 「ひらがな」But as you have maybe guessed, there are some sounds and characters tha are not in this table. They are called "deaf sounds". They are formed by adding two little sticks (called dakuten「濁点」)and a little circle (called handakuten 「半濁点」)Here we have the correspondent table of the deaf sounds.There are more theory about Hiragama waiting to be learnt, but it is to much for a single entry.
KATAKANA:Katakana is mainly used for words imported from foreign languages.Katakama represents the same set of sounds as Hiragana, except all the characters are different. There are a lot of words in Japanese that are from english (such as bed, which is ベッド that the pronunciation is "beddo") As I said before ,there are more theory that I am showing for length purposes.
KANJI: Kanji is a group of chinese characters that are mainly used to refer to verb and adjectives, but any kind of word can be found written in Kanji .Kanji does not have any kind of rule for word formation, the only way of learning it is by memorizing each simbol.
Examples: summer =「 夏」"natsu"love = 「愛」"ai"
Information obtained thanks to :http://www.guidetojapanese.org/spanish/
Jandro López Gómez