japanese pronunciation

most of all Japanese can't distinguish the difference of pronunciation "R" and "L".
there is four methods to describe letters .
"kanji" "hiragana" "katakana"　and "romaji"
海　　　　　うみ　　　　　　ウミ　　 umi

"romaji" is used for words coming from foreign countries .

this method is the description that japanese pronunciation translates to english's .
japanese has 51 basic pronunciations.

there is "R" in them. but in real not "R" but "L".
maybe there are'nt "R" pronunciation in japanese. i guess.
but we were educated using "R".
so all of japanese pronounce using "L" in stead of "R"at speaking enlish . i think.