Information: A Buddhist observance honoring the spirits of ancestors. Usually a "spirit altar" (shōryōdana) is set up in front of the Butsudan (buddhist family altar) to welcome the ancestors' souls. A priest is usually asked to come and read a sutra (tanagyō). Among the traditional preparations for the ancestors' return are the cleaning of grave sites and preparing a path from them to the house and the provision of straw horses or oxen for the ancestors' transportation. The welcoming fire (mukaebi) built on the 13th and the send-off fire (okuribi) built on the 15th or 16th are intended to light the path.