All Nichiren Shoshu Buddhist temples have a memorial book at the altar. Smaller versions are inscribed for lay believers by the Chief Priest of the local temple.
Recorded in the memorial book are the anniversaries of the deaths of Nichiren Daishonin and all the successive High Priests, acknowledgement of the religious perescutions the Daishonin endured, and the anniversaries of the deaths of our own deceased relatives and friends. It is recommended that all believers have a memorial book. It is placed to the left side of the offering table in front of the butsudan.
Reference: Nichiren Shoshu Basics of Practice, pages 19-21.