noun
betrothal money; engagement gift money
Money given by the groom's family to the bride's family as part of the traditional Japanese engagement ceremony (結納).
See also: 結納
結納金は、結納の際に新郎側から新婦側へ贈られる金品の一部です。
The betrothal money is part of the gifts presented from the groom's side to the bride's side during the engagement ceremony.