QUOTE (SkyBurial @ Aug 29 2011, 01:22 PM)
The "r"s are pronounced sort of like a "d". That's the only example I could think of atm. The "l" sound, however, is missing from the Japanese language. So when it is pronounced, usually the "r"s replaces it.
When you pronounce the "r", softly flick your tongue upward. Keep in mind that the "r"s are always followed by "ra", "ri", "ru", "ro", or "re".
ra, ri, ru, re, ro is pronounced as la, li, lu, le, lo. That is the romanization. Here is the Hiragana version of those letters: ら, り, る, れ, ろ.
The 'r' in "sayonara, arigato, hara-kiri" is pronounced as 'l'.