Here is the time I spent learning the two Japanese syllabaries
ひら and カタカナ.
I useda book called Remembering the Kana by Heisig. They use a very fast
method of teaching, as you can see.
HIRAGANA :
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Time : lesson 1 : 14 min
lesson 2 : 16 min
lesson 3 : 16 min
lesson 4 : 10 min
lesson 5 : 16 min
lesson 6 : 24 min
Total : 96 min = 1h 36 min
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KATAKANA :
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Time : lesson 1 : 8 min
lesson 2 : 4 min
lesson 3 : 12 min
lesson 4 : 20 min ?
lesson 5 : 20 min
lesson 6 : 17 min
Total : 81 min = 1h 21min