Why does Japan have 3 writing systems?

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Tags

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