There were many defects in the Family Registration Law of 1871 to begin with, and since many functions (certificates of seal impressions, certificates of land titles, etc.) were added to it, it became complicated.
そもそも、明治4年（1871年）の戸籍法は不備が多く、多くの機能（印鑑証明、地券等）を持たせたことにより、複雑となった。