I'm a super beginner, but I like to listen to Japanese music and I often hear some "L" sounds. Given the fact that there is no "L" column on hiragana tables, I assume that is some other sound, perhaps "R", being pronounced as "L" (even though I hear the R's normally).
I think it is because we don't have an exact version of the R present in Japanese, which is somewhere between L and R. When I was learning English I couldn't tell the difference between beach and b**ch, which proved to be quite comedic, however, the point is sounds are unique for each language. Our brain will interpret them as the closest thing we know, especially since the differences are often minimal. I also feel like I sometimes hear a clean L in Japanese. It could be due to different accents where the Japanese R is a bit closer to our L. Don't quote me on this though.