The Japanese Alphabets

In America, we use one alphabet. Japan uses three different ones. They are hiragana, katakana, and kanji. So why use three alphabets? Though I want to debate the practicality of it I think my complaints would fall on deaf ears as no one (with any power to change it) would understand me because my complaints would all be in English.

Each Alphabet is used for a different reason though all three are are used together.
Hiragana- used to make sounds for japanese words
Katakana- used to make the shounds for foreign words
Kanji- symbols that represent full words.

Hiragana and katakana have the exact same sounds yet they use different symbols to represent those same sound. Katakana is used to write out words that do not have a japanese origin or is often used to emphasize words (basically where we would use italics to emphasize in America they use katakana to emphasize).

Now onto learning each of these alphabets...