Lecturing others on "basic knowledge" (insert mandatory XKCD 2501 joke here), when you don't even know what a "Lich" is, is very... lich of you.
Not to mention that you fail at basic English grammar and punctuation.
On a more scientific note:
Japanese has a liquid phoneme /r/, which can either be spoken as an apico-alveolar tap, resulting in an /r/, or as an alveolar lateral approximant, resulting in an /l/. However, since this is a liquid phoneme, it is neither an /r/ nor an /l/, but something in between (that's the whole point of liquid phonemes). English (or rather, all Germanic languages) on the other hand has two phonemes, one rhotic /r/ and a lateral /l/, resulting in two distinct sounds. Therefore, what you said is not entirely true. Japanese has neither l, nor r. See: Best & Strange (1992),Yamada & Tohkura (1992) and Goto (1971).
Furthermore, Japanese speaker are entirely capable of distinguishing /r/ and /l/ as two different sounds as good as native English speakers, under the condition that they are not embedded into speech (see: Miyawaki et al. (1975))