TOKYO (Reuters) - Ceremonies to celebrate divorces have gained momentum in Japan after the massive March earthquake and tsunami, followed by an ongoing nuclear crisis, caused unhappy couples to reassess their lives. The ceremony to mark a couples transition to being single again costs 55,000 yen ($690), includes a buffet meal and culminates with the ritual smashing of their wedding rings with a gavel. The ceremony also includes a divorce dress, and Miki Saito chose a daisy-yellow summer dress. In Japan, daisies are believed to symbolise an amicable or platonic relationship.