inheritance-calculator

Name: inheritance-calculator
Availability: InStock
Author: kazumasakawahara

Calculate statutory heirs and fractional shares under the Japanese Civil Code.

Updated Feb 21, 2026

Search Tags:#inheritance #substitution #civil-code #statutory-heirs #japan-law #simultaneous-death #estate-management

Ready to run

npx skills add https://github.com/kazumasakawahara/nest-support --skill inheritance-calculator

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: inheritance-calculator
Source: https://github.com/kazumasakawahara/nest-support/tree/main/claude-skills/inheritance-calculator
Command: npx skills add https://github.com/kazumasakawahara/nest-support --skill inheritance-calculator

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

The Japanese civil-law inheritance calculations can be complex due to multiple ranks, substitutions, and simultaneous-death rules. This Skill automates determination of statutory heirs and their shares.

Core Features & Use Cases

Computes statutory heirs across spouse, children, parents, and siblings with substitution rules.
Handles simultaneous death and substitution scenarios and outputs fractions and percentages.
Validates inputs and provides clear notes for legal context and disclaimers.

Quick Start

Provide a JSON input describing the deceased, survivors, and relationships, then run the calculator to obtain heirs and shares.

Frequently Asked Questions about inheritance-calculator

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I calculate statutory inheritance shares under Japanese Civil Code?▼

Calculating statutory inheritance shares under Japanese Civil Code requires determining statutory heirs and their fractional shares based on survivor ranks. This Skill automates computing inheritance distributions across spouse, children, parents, and siblings by processing structured relationship inputs and outputting percentage shares.

How does simultaneous death affect inheritance calculations in Japan?▼

Simultaneous death in Japanese inheritance law prevents heirs who die at the same time from inheriting from each other. This Skill applies simultaneous death rules to determine statutory heirs and compute valid inheritance shares for the remaining survivors.

What is substitution in Japanese inheritance law and how is it calculated?▼

Substitution in Japanese inheritance law allows descendants of a predeceased heir to inherit that heir's share. This Skill calculates substitution scenarios for children and siblings, automatically distributing fractional and percentage shares to the substituted heirs based on structured input.

Can I compute estate distribution for a deceased person with a spouse and children but no parents?▼

You can compute estate distribution for a deceased person with a spouse and children by providing structured JSON input describing the survivors. The calculator validates the input fields and outputs the statutory heirs with their corresponding fractional and percentage shares under Japanese law.

What input format is required to calculate statutory heirs and their shares?▼

Calculating statutory heirs requires structured JSON input containing fields such as deceased_name, has_simultaneous_death, spouse, children, parents, and siblings. The Skill processes these structured relationship inputs to output heirs with fractional and percentage shares plus contextual legal notes.

Are there limitations to automated Japanese inheritance share calculations?▼

Automated Japanese inheritance share calculations are limited to statutory heir determination under the Civil Code and do not account for wills, estate tax, or property valuation. The Skill outputs fractional shares with contextual notes and legal disclaimers, but does not provide binding legal advice.