Russian Morse code

http://en.wikipedia.org/wiki/Morse_code_for_non-Latin_alphabets

The Russian Morse code is based on the Morse code for the Latin alphabet. So if you can pronounce the Russian alphabet, it is easier to learn the Russian Morse code.

http://en.wikipedia.org/wiki/Wabun_code

On the contrary, the Japanese Morse code is much more difficult to learn, because there is no phonetic relationship between the Japanese and the Latin Morse codes.