Household Shinto can focus attention on the "dōzoku-shin", "kami" who are perceived to be ancestral to the "dōzoku" or extended kinship group. A small shrine for the ancestors of a household are known as "soreisha". Small village shrines containing the tutelary kami of an extended family are known as "iwai-den". In addition to the temple shrines and the household shrines, Shinto also features small wayside shrines known as "hokora". Other open spaces used for the worship of kami are "iwasaka", an area surrounded by sacred rocks.