さん、Varshさん、Leon1552さん、
こんにちは。
Regarding the pronunciation of ‘ら’, I recommend you to say ‘la.’
When you pronounce ‘l’, your tongue touches your gums of front teeth.
Then when ‘ら’ is pronounced, your tongue should touch your hard palate.
The places where your tongue should touch are a bit different however, if you stick to ‘l’, it should be ok.
When ‘d’ is pronounced, your tongue does the same action as you pronounce ‘l’. However, ‘d’ is a voiced sound. On the other hand ‘I’ is a non-voiced sound.
That is the reason why ‘ら’ is sounded like ‘d’ or ‘だ.’
Yuki 由紀
JapanesePod101.com