kazukinagata

kazukinagata/shinkoku

Plugin Claude Code

Plugin marketplace listing 1 plugin: shinkoku.

kazukinagata/shinkoku

Plugin Claude Code

A Claude Code plugin for Japanese tax filing. It supports employees with side businesses, including business-income, blue-return, income-tax, and consumption-tax filings.

kazukinagata/shinkoku

Instructions file

A project instruction file for shinkoku, a Japanese tax-return automation system for people such as employees with side businesses and individual business owners. It documents who the system supports, how it works, and which tax situations are outside its scope.

kazukinagata/shinkoku

Skill Claude CodeCodex

This skill should be used when the user asks to determine what tax filings they need, wants to know if they must file a tax return (確定申告), asks about consumption tax obligations (消費税), or needs help understanding their filing requirements. Trigger phrases include: "確定申告が必要か", "申告の種類", "消費税の届出", "課税事業者かどうか"…

kazukinagata/shinkoku

Skill Claude CodeCodex

Display shinkoku's current capabilities, supported personas, and known limitations. Use when the user asks "what can you do?", "what's supported?", or similar questions.

kazukinagata/shinkoku

Skill Claude CodeCodex

A Japanese consumption-tax calculator that uses taxable sales and purchases to calculate the tax amount and applies the selected filing method, such as the 20% special rule, simplified taxation, or standard taxation.

kazukinagata/shinkoku

Skill Claude CodeCodex

A compliance checker for Japan's rules on keeping high-quality electronic accounting books. It checks whether accounting records and related documentation meet specified requirements for electronic storage.

kazukinagata/shinkoku

Skill Claude CodeCodex

This skill should be used when the user wants to file their tax return electronically via the 確定申告書等作成コーナー (NTA Tax Return Preparation Corner) using Claude in Chrome, Antigravity Browser Sub-Agent, or Playwright CLI (fallback). It guides the browser-based input of calculated tax data. Trigger phrases include…

kazukinagata/shinkoku

Skill Claude CodeCodex

This skill manages furusato nozei (hometown tax) donations. Use when the user wants to register donation data, read donation receipts, check deduction limits, or manage their furusato nozei records. Trigger phrases: "ふるさと納税", "furusato", "寄附金", "寄付金", "ふるさと納税の控除", "寄附金受領証明書", "ワンストップ特例".

kazukinagata/shinkoku

Skill Claude CodeCodex

A document-collection guide for Japanese tax filing that lists the documents needed for the filing type and explains where and how to obtain them.

kazukinagata/shinkoku

Skill Claude CodeCodex

A workflow for calculating Japanese income tax, deductions, refunds, and payment amounts from income records. It assumes the related blue-return financial statements have already been completed.

kazukinagata/shinkoku

Skill Claude CodeCodex

A guide for moving from working as an individual business owner to operating through a company in Japan. It covers company types, setup steps, officer pay, taxes, and social insurance.

kazukinagata/shinkoku

Skill Claude CodeCodex

This skill should be used when the user asks about the invoice system (インボイス制度), qualified invoices (適格請求書), registration numbers (登録番号), input tax credits (仕入税額控除), the 20% special measure (2割特例), the 30% special measure (3割特例), tax-exempt businesses (免税事業者), transitional measures (経過措置), small-amount exceptions…

kazukinagata/shinkoku

Skill Claude CodeCodex

A bookkeeping tool for recording financial transactions in a general ledger, including entries imported from CSV files, receipts, or invoices. A general ledger is a record of a business’s income and expenses.

kazukinagata/shinkoku

Skill Claude CodeCodex

An image-reading workflow for extracting structured information from Japanese insurance and social-insurance deduction certificates. It can read image files and PDFs, including scanned PDFs.

kazukinagata/shinkoku

Skill Claude CodeCodex

A guide for reading invoice images or PDFs and returning structured details such as the supplier, date, and amount.

kazukinagata/shinkoku

Skill Claude CodeCodex

An image-reading workflow for extracting structured information from Japanese payment statements, which report payments such as fees, compensation, contracts, or prizes.

kazukinagata/shinkoku

Skill Claude CodeCodex

An image-reading workflow for extracting structured information from receipts, invoices, and hometown-tax donation certificates. It can first extract text from PDFs and otherwise read their images.

kazukinagata/shinkoku

Skill Claude CodeCodex

A skill for reading Japanese withholding-tax certificates from images or PDFs and turning their contents into structured data.

kazukinagata/shinkoku

Skill Claude CodeCodex

A year-end accounting workflow for recording closing adjustments and checking financial statements such as the trial balance, income statement, and balance sheet.

kazukinagata/shinkoku

Skill Claude CodeCodex

This skill should be used when the user wants to set up shinkoku for the first time, initialize their configuration, or update their existing settings. Trigger phrases include: "セットアップ", "初期設定", "設定ファイルを作る", "shinkokuの設定", "config", "setup", "始め方", "使い方", "設定を更新", "configを作り直す".

kazukinagata/shinkoku

Skill Claude CodeCodex

This skill should be used when the user is ready to submit their tax return, needs a final review checklist, wants to know how to submit (e-Tax, mail, or in-person), or asks about common mistakes before submission. Trigger phrases include: "提出準備", "提出方法", "e-Taxで提出", "チェックリスト", "申告書の確認", "提出前の確認", "郵送で提出"…

kazukinagata/shinkoku

Skill Claude CodeCodex

A Japanese tax-advice skill based on 2025 tax rules. It answers tax-filing and tax-saving questions using documents in a reference folder rather than general guesses.

kazukinagata/shinkoku

Skill Claude CodeCodex

Background context for the Electronic Bookkeeping Act (電子帳簿保存法) in the shinkoku tax filing plugin. Contains requirements for electronic bookkeeping, scanner storage, mandatory electronic transaction data storage, and shinkoku's compliance status. This skill is not user-invocable — Claude loads it automatically when…