Japanese Tax Basics

How taxes work in Japan, organized simply with tables. A quick starting point for understanding filing and everyday tax saving.

Note: This is an English translation of our Japanese article. Rules, figures and thresholds change, and the Japanese version together with official sources are authoritative. For individual decisions, consult a tax office or a licensed tax accountant (zeirishi).

What are taxes?

Taxes fund the infrastructure and public services society relies on — roads, healthcare, education, disaster prevention and more.

Why learn about them?

Understanding how taxes work makes filing, tax saving and money management far easier. It is the first step to avoiding wasted spending.

Main types of tax

Type of tax	What it applies to	Who pays it
Income tax	An individual's income	Employees and the self-employed
Residence tax	The previous year's income	All residents
Corporate tax	A company's profit	Companies and corporations
Consumption tax	Consumption of goods and services	Consumers (remitted by businesses)

Types of income

Employment income: salaries and wages of employees and part-timers
Business income: earnings of sole proprietors and freelancers
Real estate income: rental income and the like
Miscellaneous income: side jobs, pensions and other income

What is progressive taxation?

A system where the tax rate rises as income grows. Because rates increase in brackets, people with higher incomes bear a larger amount.

Key point: Rates rise in steps. Doubling your income does not double your tax.

How deductions work

Basic deduction

A deduction anyone can claim. It reduces the income subject to tax.

Spousal deduction

Available when a spouse's income is below a set level. It eases the household's burden.

Social insurance premium deduction

If you pay social insurance premiums, that amount can be deducted from your income.

The tax-return process

Organize your income and expenses
Prepare the required documents
Calculate the tax due
Submit the return
Pay the tax (or receive a refund)

Income deductions vs. tax credits

There are two kinds of "deduction." Knowing the difference shows you how tax saving actually works.

Income deductions

Reduce the taxable income itself (basic deduction, social insurance premium deduction, medical expense deduction, etc.). The saving equals "deduction × tax rate," so it helps higher earners more.

Tax credits

Subtracted directly from the calculated tax (mortgage loan credit, dividend credit, etc.). The credit amount reduces the tax one-for-one, so the impact is large.

FAQ

How do income tax and residence tax differ?

Income tax is a national tax levied on the income you earn during the year. Residence tax is paid to your prefecture and municipality and is generally based on the previous year's income, charged in the following fiscal year. For employees, income tax is withheld monthly from salary and settled through year-end adjustment.

What is the difference between a deduction and an expense?

An expense is a cost incurred to earn business revenue and is subtracted when calculating income. A deduction is subtracted further from the calculated income or tax; there are income deductions and tax credits.

Who needs to file a tax return?

Sole proprietors, people who receive salary from two or more employers, and employees whose non-salary income exceeds a set amount, among others. Even employees must file to claim the medical expense deduction, the first year of the mortgage loan credit, or Furusato Nozei donations to six or more municipalities.

Sources / official information

This article is based on the official information below. Rules may be revised; please check each official site for the latest details.

※ This article is for general information only and is not tax or legal advice. For individual tax matters, consult your local tax office or a licensed tax accountant (zeirishi).