Agent skill

Jp Tax Return

by mohitagw15856 in mohitagw15856/pm-claude-skills

A skill your agent uses when asked 確定申告のやり方, do I need to file a tax return in Japan, how do I claim medical expense deduction, ふるさと納税の確定申告, 副業の確定申告, how to file with e-Tax, or 日本报税怎么弄.

MITAuto-check passedBusiness, Finance & HR

Install Jp Tax Return

skills CLI
$ npx skills add mohitagw15856/pm-claude-skills --skill jp-tax-return -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install mohitagw15856/pm-claude-skills jp-tax-return --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/mohitagw15856/pm-claude-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/jp-tax-return .claude/skills/jp-tax-return && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
jp-tax-return
GitHub stars
1.4k
Token cost
~926 tokens
SKILL.md length
491 words
Files
1
Skills in repo
1,348
Repo updated
First seen
Licence
MIT

At a glance

A skill your agent uses when asked 確定申告のやり方, do I need to file a tax return in Japan, how do I claim medical expense deduction, ふるさと納税の確定申告, 副業の確定申告, how to file with e-Tax, or 日本报税怎么弄.

  • Works in 5 steps: Do you need to file? → What to declare → Filing step by step → …
  • Do I need to file a tax return in Japan
  • SKILL.md covers Required Inputs, Output Structure, Quality Checks and Anti-Patterns, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Jp Tax Return is an agent skill from mohitagw15856/pm-claude-skills. Use when asked 確定申告のやり方, do I need to file a tax return in Japan, how do I claim medical expense deduction, ふるさと納税の確定申告, 副業の確定申告, how to file with e-Tax, or 日本报税怎么弄. Produces whether the person must or should file, the income and deductions to declare, a step-by-step filing plan with e-Tax or on paper, the documents to gather, and the deadlines and payment options to confirm with the National Tax Agency.

Its SKILL.md is about 930 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Business, Finance & HR, covering Tax preparation. The repository describes itself as: 1255 professional Agent Skills for Claude, ChatGPT, Gemini, Cursor & Codex — PRDs, postmortems, leases, medical bills, layoffs, go-bags, new countries. Plain markdown, MIT, in… The licence is MIT.

When your agent uses it

  • Do I need to file a tax return in Japan
  • How do I claim medical expense deduction
  • How to file with e-Tax

Example prompts

  • “/jp-tax-return”

Workflow steps

5 steps, taken from the step headings in SKILL.md.

  1. Do you need to file?
  2. What to declare
  3. Filing step by step
  4. Documents checklist
  5. Deadlines and payment

What it can do on your machine

Read from SKILL.md and the folder at commit 1cbf1f0. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Jp Tax Return loads about 926 tokens when it runs. Until then it costs about 105 tokens; SKILL.md has 491 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~105
When it runs · the whole SKILL.md, loaded when a task matches
~926

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from mohitagw15856/pm-claude-skills at commit 1cbf1f0, republished under its MIT licence (© mohitagw15856). 491 words, ~926 tokens.

Download SKILL.mdSave it as .claude/skills/jp-tax-return/SKILL.md (or your agent's skills folder).
name
jp-tax-return
description
Use when asked 確定申告のやり方, do I need to file a tax return in Japan, how do I claim medical expense deduction, ふるさと納税の確定申告, 副業の確定申告, how to file with e-Tax, or 日本报税怎么弄. Produces whether the person must or should file, the income and deductions to declare, a step-by-step filing plan with e-Tax or on paper, the documents to gather, and the deadlines and payment options to confirm with the National Tax Agency.
version
1.0.0

Japan Tax Return (確定申告)

Most employees in Japan never file a return because their employer settles tax through year-end adjustment. But anyone with side income, freelance work, two employers, large medical bills, a new housing loan or ふるさと納税 beyond the one-stop limit may have to, or would get money back by doing so. This skill decides whether the person needs to file, and walks them through it.

Write in Japanese unless the person asks for English or Chinese. Thresholds, forms and the filing period are set by the National Tax Agency (国税庁) and change; mark every figure to confirm on nta.go.jp. This is information, not tax advice; for business accounts, blue returns or inheritance, suggest a 税理士.

Required Inputs

Ask for these if not provided:

  • Income: salary (from the 源泉徴収票), side or freelance income and expenses, pensions, investment income outside NISA, rent
  • Employers: how many, and whether year-end adjustment was done
  • Deductions to claim: medical expenses, ふるさと納税, housing loan (first year), donations, insurance not claimed at work
  • Tools: マイナンバーカード and a smartphone or card reader for e-Tax, or paper
  • Last year: whether they filed, and as blue (青色) or white (白色) for business income

Output Structure

1. Do you need to file?

| Situation | Must file / should file / no need | Why (confirm thresholds) | Including the side-income threshold for employees, two employers, and refunds worth claiming. Note that 住民税 reporting may still be needed when a national return is not.

2. What to declare

Income by type with the amounts the person gave, deductible expenses for side income, and each deduction with its rule (for example the medical expense threshold, and that the ふるさと納税 one-stop exception is cancelled once a return is filed, so every donation must be declared).

Show full SKILL.md (204 more words)Show less
3. Filing step by step

With e-Tax (マイナポータル連携 where it helps) or the NTA's online form, or on paper; the order of screens or sections, and what to keep.

4. Documents checklist

| Document | For | Where it comes from |

5. Deadlines and payment

The filing period (typically mid-February to mid-March; confirm the dates for the year), refund timing, payment methods and the transfer-tax option, and what happens if the deadline is missed.

Quality Checks

  • The need to file is decided from the person's facts before any steps are given
  • Every threshold, date and form is marked to confirm with the NTA
  • The ふるさと納税 one-stop cancellation is stated whenever a return is filed
  • Side-income expenses are separated from personal spending
  • The output says it is information, not tax advice

Anti-Patterns

  • Assuming an employee never needs to file. Side income, two jobs and refunds change that.
  • Filing and forgetting the one-stop donations. They must all go on the return.
  • Claiming personal costs as business expenses. It invites a correction with penalties.
  • Missing the deadline for a refund-only return. Refund claims have their own time limit; confirm it.

Example Trigger Phrases

  • "副業で年30万円くらい稼いだ。確定申告は必要?"
  • "医療費が15万円かかった。医療費控除のやり方を教えて。"
  • "How do I file my Japanese tax return with e-Tax? I'm a freelancer."
  • "在日本做副业要报税吗?怎么用 e-Tax?"

© mohitagw15856, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/jp-tax-return of mohitagw15856/pm-claude-skills.

Open the folder on GitHubat commit 1cbf1f0

Compare with similar skills

Jp Tax Return next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Jp Tax Return compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Jp Tax Return this skillmohitagw15856/pm-claude-skills1.4k—~926Automated safety check: PassMIT
Itr Walakaranb192/itr-wala871—~3.6kAutomated safety check: PassMIT
Tax Filingrobbalian/claude-tax-filing174—~2.5kAutomated safety check: PassNone
India Itr CopilotLoki200399/india-itr-copilot147—~2.4kAutomated safety check: PassMIT
Consumption Taxkazukinagata/shinkoku365—~1.8kAutomated safety check: PassMIT
Beancount Optionsbex-co/beancount-io297—~3.7kAutomated safety check: PassMIT

Similar skills

  • Itr Wala

    karanb192/itr-wala

    File Indian income tax returns (ITR) for FY 2025-26 / AY 2026-27.

    871 GitHub stars~3.6k tokensUpdated 7 days ago
    Business, Finance & HRAuto-check passed
  • Tax Filing

    robbalian/claude-tax-filing

    Prepare and fill federal and state tax return PDF forms. An agent skill from robbalian/claude-tax-filing.

    174 GitHub stars~2.5k tokensUpdated 5 mo ago
    Business, Finance & HRAuto-check passed
  • India Itr Copilot

    Loki200399/india-itr-copilot

    Documents-first copilot for preparing Indian Income Tax Returns (ITR-1/2/3/4, any assessment year).

    147 GitHub stars~2.4k tokensUpdated 2 mo ago
    Business, Finance & HRAuto-check passed
  • Consumption Tax

    kazukinagata/shinkoku

    This skill should be used when the user needs to calculate consumption tax (消費税) or determine their tax method (2割特例, 簡易課税, or 本則課税).

    365 GitHub stars~1.8k tokensUpdated 1 mo ago
    Business, Finance & HRAuto-check passed
  • Beancount Options

    bex-co/beancount-io

    Record a described options trade or lifecycle event as validated Beancount transactions through bea, after review and confirmation.

    297 GitHub stars~3.7k tokensUpdated today
    Business, Finance & HRAuto-check passed
  • Invoice Organizer

    davila7/claude-code-templates

    Automatically organizes invoices and receipts for tax preparation by reading messy files, extracting key information, renaming them consistently, and sorting them into logical folders.

    33k GitHub starsUsed in 12 repos~2.9k tokens
    Business, Finance & HRAuto-check passed

More from mohitagw15856/pm-claude-skills

All 1,348 skills in this repo
  • Car Tco

    mohitagw15856/pm-claude-skills

    Compare the total cost of car ownership across buy-new, buy-used, lease, and keep-your-current-car — depreciation, insurance, maintenance ramp, and fuel over a real horizon, not just the monthly…

    1.4k GitHub stars~1.1k tokensUpdated 2 days ago
    Auto-check passed
  • Cs Health Scorecard

    mohitagw15856/pm-claude-skills

    Build a customer health scorecard for a specific account. An agent skill from mohitagw15856/pm-claude-skills.

    1.4k GitHub stars~2.4k tokensUpdated 2 days ago
    Auto-check passed
  • Exit Waterfall

    mohitagw15856/pm-claude-skills

    Compute who gets what at each exit price from a cap table — liquidation preferences, conversion points, and where the founders' share collapses.

    1.4k GitHub stars~1.1k tokensUpdated 2 days ago
    Auto-check passed
  • Feature Prioritisation

    mohitagw15856/pm-claude-skills

    Apply prioritisation frameworks (RICE, MoSCoW, Kano, ICE, Opportunity Scoring) to rank features and backlog items.

    1.4k GitHub stars~2k tokensUpdated 2 days ago
    Auto-check passed
  • Fire Number

    mohitagw15856/pm-claude-skills

    Compute a financial-independence (FIRE) target and years-to-reach with every assumption labeled as an assumption — plus a sensitivity table instead of a single false-precision answer.

    1.4k GitHub stars~1.1k tokensUpdated 2 days ago
    Auto-check passed
  • Freelance Rate

    mohitagw15856/pm-claude-skills

    Derive a freelance day/hourly rate backwards from target income, honest billable utilization, overhead, and the self-employment tax premium — the arithmetic that proves a rate is not salary÷2000.

    1.4k GitHub stars~1.2k tokensUpdated 2 days ago
    Auto-check passed

Questions about Jp Tax Return

What does Jp Tax Return do?

A skill your agent uses when asked 確定申告のやり方, do I need to file a tax return in Japan, how do I claim medical expense deduction, ふるさと納税の確定申告, 副業の確定申告, how to file with e-Tax, or 日本报税怎么弄. Jp Tax Return is an agent skill from mohitagw15856/pm-claude-skills. Use when asked 確定申告のやり方, do I need to file a tax return in Japan, how do I claim medical expense deduction, ふるさと納税の確定申告, 副業の確定申告, how to file with e-Tax, or 日本报税怎么弄.

When should I use Jp Tax Return?

Jp Tax Return fits situations like: do I need to file a tax return in Japan; how do I claim medical expense deduction; how to file with e-Tax.

How do I install Jp Tax Return in Claude Code?

Run `npx skills add mohitagw15856/pm-claude-skills --skill jp-tax-return -a claude-code`. Or copy the skill folder (skills/jp-tax-return in mohitagw15856/pm-claude-skills) into .claude/skills/jp-tax-return in your project. Claude Code loads it when a task matches its description.

How do I install Jp Tax Return in Codex?

Run `npx skills add mohitagw15856/pm-claude-skills --skill jp-tax-return -a codex`. Or copy the skill folder (skills/jp-tax-return in mohitagw15856/pm-claude-skills) into .agents/skills/jp-tax-return in your project. Codex loads it when a task matches its description.

Can I use Jp Tax Return in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mohitagw15856/pm-claude-skills --skill jp-tax-return -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/jp-tax-return, .gemini/skills/jp-tax-return, .github/skills/jp-tax-return and .opencode/skills/jp-tax-return in your project.

What does Jp Tax Return need to run?

SKILL.md names no scripts, command-line tools or credentials: Jp Tax Return is instructions for the agent only.

Does Jp Tax Return access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Jp Tax Return safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Jp Tax Return use?

Jp Tax Return is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Jp Tax Return use?

About 926 tokens (SKILL.md is roughly 3.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Jp Tax Return?

Skills that share tags, products or a category with Jp Tax Return: Itr Wala (karanb192/itr-wala, 871 stars), Tax Filing (robbalian/claude-tax-filing, 174 stars), India Itr Copilot (Loki200399/india-itr-copilot, 147 stars) and Consumption Tax (kazukinagata/shinkoku, 365 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Jp Tax Return?

mohitagw15856 (a GitHub user) maintains it in mohitagw15856/pm-claude-skills, which has 1,434 GitHub stars. The repository holds 1,348 skills in this directory. The repository was last updated on October 9, 2026.

Source: mohitagw15856/pm-claude-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.