How does it handle the '103k yen wall' or '130k yen wall' questions?

The skill references specific files for resident tax, income tax, and social insurance to provide a holistic view of how different income levels affect tax-free status and dependency.

Does this skill support the latest 2025 tax reforms?

Yes, the Tax Advisor skill is specifically updated to reflect the Reiwa 7 (2025) tax year regulations, including current deduction limits and rate schedules.

Can I use this for business expense tracking?

While it doesn't replace accounting software, it provides expert guidance on whether specific items qualify as business expenses or house-apportioned costs based on Japanese tax standards.

Is the advice legally binding?

No. The skill provides general tax information and simulations for preparation purposes. You should always consult with a certified tax accountant (税理士) for official tax filing.

Japanese Tax Advisor

Name: Japanese Tax Advisor
Author: kazukinagata

bykazukinagata

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323

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Productivity & Workflow

Provides expert Japanese tax guidance, deduction simulations, and filing preparation based on 2025 tax regulations.

This skill transforms Claude into a specialized Japanese tax consultant, offering precise advice on income tax, resident tax, and business expenses. It utilizes a structured reference system to ensure accuracy according to the Reiwa 7 (2025) tax reforms, assisting users with complex scenarios like income 'walls' (103k/130k yen), blue return benefits, and medical expense deductions. Whether you are a freelancer navigating the invoice system or an individual looking to optimize iDeCo and NISA contributions, this skill provides step-by-step calculations and legal references to streamline your tax preparation and financial planning.

Key Features

01Detailed simulations for Furusato Nozei, mortgage deductions, and medical expenses.

02Comprehensive support for Reiwa 7 (2025) Japanese tax law and reforms.

03Automated 'Income to Earnings' conversion logic using official glossary terms.

04Guidance on business expense classification, blue returns, and the invoice system.

05Structured response format including legal references, calculation steps, and disclaimers.

06323 GitHub stars

Use Cases

01Calculating the maximum effective limit for Furusato Nozei based on current income.

02Analyzing the impact of social insurance 'walls' and dependency status on household taxes.

03Determining if a specific business expense is deductible for freelance or side-business income.

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add kazukinagata/shinkoku tax-advisor

For use in Claude.ai and ChatGPT

Download Skill