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Statutory Inheritance Share Calculator (Japan)

Enter whether a spouse survives and the number of children, parents (lineal ascendants), and siblings to instantly work out each heir's statutory inheritance share under Japan's Civil Code, shown as a fraction and a percentage.

Input

Surviving spouse

people
people
people

Heirs rank in order: children → parents/grandparents → siblings. If a higher-ranking heir exists, lower-ranking relatives do not inherit.

Result

Statutory inheritance share (estimate)

Heirs: the spouse and the children (1st rank).

Spouse

1/2

50%

Children (2)

1/2 in total (50%)

Per person

1/4

25%

How it works

  • This tool estimates the "statutory inheritance share" under Japan's Civil Code. If there is a will, or the heirs all agree on a different division, the actual split may differ from these shares.
  • Heirs rank in order: (1) children, (2) lineal ascendants (parents, then grandparents), and (3) siblings. If a higher-ranking heir exists, lower-ranking relatives do not inherit. A surviving spouse is always an heir.
  • Spouse and children: 1/2 to the spouse and 1/2 shared by the children. Spouse and ascendants: 2/3 and 1/3. Spouse and siblings: 3/4 and 1/4. Each group's share is split equally among its members.
  • With no spouse, the blood relatives of the applicable rank split the whole estate equally. With a spouse but no blood heirs, the spouse inherits everything.
  • Children born outside marriage are treated as having the same share as other children (they were previously half, but the law was corrected).
  • This tool does not cover special cases such as inheritance by representation (grandchildren, nieces or nephews inheriting in place of a deceased heir) or half-blood siblings (whose share is half that of full siblings). It is a general estimate only; for an exact treatment, consult a lawyer, judicial scrivener, or tax accountant.

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