Alphabet "e" in Indonesian has 2 ways to pronuonced.
*First, soft "e", as in word "belajar", it's pronounced like "e" in English word "verb" or "으" in Korean.
*Second, hard "e", as in word "komentar", it's pronounced like "e" in English word "comment" or "에" in Korean or "え" in Japanese.
In Indonesia, soft "e" & hard "e" is only written in "e". So, we have to learn the pronounciation of the words those include "e". Don't worry, we don't have to think hardly about that, it will be naturally understand if we practice to listen to more conversation in Indonesian, then we will master it.
FYI, there's no soft "e" in Japanese, that's why I think it's a little hard for Japanese people to pronounce it, but again, don't worry, a singer from Japan, Haruka Nakagawa can do it. I like her sounds in Japanese & Indonesian :).
[Neo Lim]