Temporary memorial tablet - kariihai

...They are considered to be the residence of the deceased's spirit, and are placed in the Buddhist altar and are the subject of memorial services during Bon, Higan, the anniversary of the death, or in the morning and evening. Generally, two temporary tablets are made at the time of the funeral, written in ink on plain wood; one is taken to the cemetery and the other is placed in the Buddhist altar at home, and then replaced with the main tablet, which is lacquered or gold leafed, on the 49th day after the death or one to three years after the death. Buddhist ihai are equivalent to Confucian priests and Shinto spirit substitutes. ...

*Some of the terminology explanations that mention "temporary memorial tablets" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…死者霊の依代（よりしろ）とみなされ，仏壇に安置されて盆，彼岸，命日，あるいは朝晩の供養の対象となる。一般に葬式の際に白木に墨書した二つの仮位牌を作り，一つは墓地へ，他は家の仏棚に安置し，忌明けの四十九日ないし一～三年忌のときに漆塗や金箔塗の本位牌に換える。仏教の位牌は儒教の神主（しんしゆ）や神道の霊代（みたましろ）に相当する。…

※「仮位牌」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報