Japan has unusual wedding style. Marriage has traditionally been considered a matter between families rather than individuals, and people used to invite matchmaker to witness the marriage however, not so many people have a matchmaker these days. As proof of engagement, both families and the matchmaker gather on an auspicious day to have an official ceremony, known as a yuino, in which the families exchange betrothal money and gift. It is important for Japanese to do. I think it is unusual wedding.