Japanese weddings are a big affair.
They have a mixture between the traditional shinto weddings and western Christian traditions.
Often they wear traditional Japanese clothes for the ceremony.
Men and women both wear special types of kimono.
But change into “fashionable western” suits and dresses for the after party.
Often guests have to pay a significant sum to attend a ceremony or party (around 10,000 yen).
But you are given gifts when you leave the wedding party.
For some background check out this information on Japan guide.