Japanese wedding. A Japanese groom also wears a formal kimono, called a montsuki kimono. It’s tied at the waist with a sash and tucked into loose, pleated hakama pants that fall to the ankles. The groom can also wear a matching haori overcoat, made to keep the kimono clean and dry in bad weather. The montsuki is usually black and features the groom’s family crest in white on the front and back.