Shinto wedding
Shinto weddings, Shinzen kekkon, Shinzenkekkon (神前結婚, "Marriage before the kami"), began in Japan during the early 20th century, popularized after the marriage of Crown Prince Yoshihito and his bride, Princess Kujo Sadako. The ceremony relies heavily on Shinto themes of purification, and involves ceremonial sake drinking of three cups three times, the nan-nan-san-ku-do.