Why do Japanese have 3 alphabets?

Related questions

1. Is duolingo or Rosetta Stone better?
2. How hard is it to learn to speak Japanese?
3. Is Pimsleur better than Rosetta Stone?
4. Why do Japanese people read right to left?
5. Do Asians read right to left?
6. Is hiragana an alphabet?
7. Is Hiragana written left to right?
8. Do Chinese understand Japanese?
9. Is Japanese or Chinese harder?
10. Is Babbel or Rosetta Stone better?

Tags

1. #language
2. #sounds
3. #system
4. #kanji
5. #eventually
6. #words
7. #characters
8. #hiragana
9. #standardized
10. #started
11. #native
12. #third
13. #based
14. #while
15. #alphabet
16. #chinese
17. #origin
18. #companion
19. #foreign
20. #these
21. #writing
22. #katakana
23. #japan