The Spirit Boat Procession (精霊流し Shōrō nagashi?) is an event celebrated in various places in Nagasaki prefecture, Japan. It is part of the Bon Festival. During the event, the souls of the deceased are mourned and sent off.
The procession takes place on August 15 of every year. During the procession, people float boats which are said to be carrying the spirits of the deceased down the river. The spirits are said to be sent to Sukhavati. It is done as an act of mourning by those who have lost a family member in the past year, though people who are not mourning participate as well.
As with many other Japanese festivals, people carry firecrackers and gongs, and often sound off with kakegoe. Some boats are built up to look like festival floats, and many tourists come to see the event. Despite the atmosphere, the procession is actually a Buddhist event of mourning the deceased. At one time the boats were floated off into the ocean, but in recent years the boats are retrieved before they go out that far so as to prevent polluting the ocean.
In 2010, it was reported that more than 180,000 people had attended the event.
The boats are called shōrōbune (精霊船?). The boats are said to carry the souls of the deceased on them. The boats are mainly built by people who have lost a family member in the last year, though they are also built by others.
The boats can be built from a quantity of different supplies and no particular one is preferred. Bamboo and grass are often used, though cogongrass is popular in Saikai, Nagasaki, and some other people use hardened corrugated cardboard. People who are mourning decorate the boat with the family crest, put a portrait of the deceased and the mortuary tablet on the boat, and also sometimes use a token that exemplifies the person (e.g. a shogi player may have a shogi piece on the boat). Those who are not mourning generally build small laced rafts, and set O-Bon lanterns, fruit or non-natural flowers on them instead. Boats made by individuals or family members are generally between 1 and 2 meters. Often boats also have a sail with sutras for Buddha and Kannon.