A sake-sharing ceremony is traditional at which country’s weddings?
Sake, an alcoholic beverage made from fermented rice, has been part of Japanese culture for centuries, so it’s no surprise that it’s worked its way into Japanese weddings. Traditionally, the sake-sharing ceremony is part of weddings of the Shinto religion. During the ritual, called “san san kudo,” the bride and groom drink sake from the same cup, uniting them as husband and wife.
Source: The Knot