Uchi-ihai is a simple ihai made of plain wood which is inscribed with the posthumous Buddhist name, the secular name (name before death), the date of death, and the age at death (or to which paper inscribed with these is attached).
死者の戒名・俗名（生前の姓名）・死亡年月日・享年（行年）が書かれた（あるいはこれらが書かれた紙を貼った）白木の簡素な位牌。