Wakamachi

Wakamachi [覚斎萦 わかまち] is a ceremony traditionally practiced in Kanton in remembrance of the dead. It is typically held on the first, seventh and twentieth anniversaries of a family member's death. The purpose of the ceremony is to set their soul at rest in the afterlife, to show respect to their memory, and to strengthen the connection between the spirits of the living and the dead.
To perform the ritual, the family gathers at the home of the eldest daughter to prepare many kinds of food such as rice wine, soups, curried vegetables, candied fruits, rice cakes, and fruit punch (tōyu), and any other foods which were favoured by the deceased. Once the food is served, the person's name is written in calligraphy on a piece of paper at the centre of the table to invoke their spirit. A mug and bowl for the deceased is set out in the middle of the table. Incense, usually sandalwood, is burned. The ritual is then carried out using the following steps:
# Ritual greetings are called to invite the spirit down, using their full name (and title if applicable).
# The eldest female descendant pours the first offering of rice wine into the central mug, followed by her husband. Then the second-eldest-born (either son or daughter) will do the same, and so on until every descendant has made an offering.
# A spoonful of food is placed into the central bowl by everyone down to the youngest member of the congregation. 
# All family members leave the room in order for the spirit to eat in peace.
# After a few minutes, they return to the room led by the eldest female descendant, and the paper on which the name was written is burned. A ritual farewell and blessing is given to the spirit of the dead, and the feast begins.
Ancestor worship has changed significantly in recent years. In modern times it is common to hold Wakamachi rituals up to only two generations of deceased, and in some families, people only hold the ceremony for their dead parents.