The traditional Japanese ceremony is a Shinto ceremony, though many Japanese in America celebrate weddings with a Buddhist ceremony. Regardless of religious rituals, most also include a cultural sake-sharing tradition at the wedding, popularly called "san-san-kudo" "san" means three, "ku" means to deliver, and "do" means nine.
This ritual dates back to a time when sharing sake created a formal bond as strongly as a handshake did during the Victorian times. Using three flat sake cups stacked atop one another, the bride and groom take three sips each from the cups. Then their parents also take sips (for a total of nine sips), cementing the bond between the families.
If you married an Okinawan and if either of you have some memorable moments or some helpful tips for those about to take the "plunge" I would really like to read and share them.