According to Japanese Buddhist belief, every summer at this time spirits of the dead return to visit their families. O-Bon is a Buddhist ceremony for welcoming back and appeasing the souls of our ancestors.
During the course of this festival, the souls of the dead are guided home, feted for several days, and then sent back to the spirit world.
The formal name of this festival is Ura-Bon. Depending on the region, the Bon Festival may be held one month later, during August 13th-15th.
The word O-Bon has its roots in the Sanskrit word ullambana, which means ‘deliverance from suffering’. The festival combines early Buddhist rituals designed to rescue the souls of the dead from hell, with native Japanese agricultural rites and the Shinto tradition of welcoming back the souls of ancestors in late summer.
Traditionally, the bones of the deceased are placed in individual urns and kept with their ancestors in a family tomb (ohaka). For several consecutive evenings during the week of O-Bon, paper lanterns painted with the family crest are hung to guide the ancestral spirits to the ohaka.
Alternatively, small welcoming fires (mukaebi) may be lit at the entrance to the home, or in front of the gate early on the evening of the 13th to receive the souls of the ancestors.
It is also customary at this time to clean the family grave and present fresh flowers and incense. Those who are unable to travel to their family burial place may instead spruce up the domestic altar. Houses are cleaned and decorated and a place is sometimes set at the family table for the recently departed.
Although many Japanese also hold Shinto beliefs, it is Buddhism that is associated with rituals concerned with death. Therefore it is the Buddhist household altar — the butsudan — that remains the focus of attention during O-Bon.
Offering stands and a small tray with tiny dishes for the symbolic meals offered to the ancestors are brought out, and a special shelf (Shoryodana or 'Shelf of Souls') is set up in front of the altar; it is here that, for the duration of O-Bon, the spirits are believed to dwell.
At the end of three days (on the 16th), the lanterns are again set out to guide the spirits back, and an okuribi (farewell) fire is lit to see off the souls of the ancestors.
Collected from various sources including Mythic Maps