減価償却費 (genkashoukyakuhi) means depreciation expense in Japanese.

Depreciation expense is the accounting process of allocating the cost of tangible assets over their useful lives. This method recognizes that assets like machinery, vehicles, and buildings lose value over time due to wear and tear, usage, or obsolescence.

In Japan, depreciation expense is a significant component of financial statements, helping businesses reflect the declining value of their fixed assets accurately. The amount and method of depreciation can affect a company's taxable income, making it crucial for tax reporting and financial planning.

The two common methods of depreciation in Japan are the straight-line method, where the asset's cost is spread evenly over its useful life, and the declining balance method, where higher depreciation expenses are recorded in the earlier years of the asset's life, decreasing over time.

Understanding and correctly applying depreciation expense is essential for accurate financial reporting and tax compliance in Japan.

源泉徴収税 (gensen choshūzei) translates to "withholding tax" in English.

It refers to the tax deducted at the source of income, meaning the payer of the income withholds a portion of the payment and pays it directly to the tax authorities. This system ensures that taxes are collected in advance and helps to prevent tax evasion.

In Japan, withholding tax is commonly applied to various types of income, including salaries, bonuses, interest, dividends, and certain payments to non-residents. Employers, financial institutions, and other entities responsible for making payments must withhold the appropriate amount of tax and remit it to the National Tax Agency.

The rates and specific rules for withholding tax can vary depending on the type of income and the residency status of the recipient. For example, the standard withholding tax rate on salary income for residents is based on progressive tax rates, while non-residents might face a flat rate on certain types of income.

Properly managing withholding tax obligations is crucial for businesses operating in Japan to remain compliant with tax regulations.

控除 (kojo) is a tax deduction in Japan. It refers to the amounts that can be subtracted from an individual's total income to reduce their taxable income. By lowering the taxable income, tax deductions can significantly decrease the amount of tax an individual owes.

Various types of deductions are available, each designed to provide financial relief for specific circumstances. Common deductions includes those for dependents, medical expenses, social insurance premiums, and mortgage interest. For instance, the spousal deduction and dependent deduction help families reduce their tax burden by acknowledging the financial responsibilities of supporting a spouse or dependents.

To claim these deductions, taxpayers must provide the necessary documentation and meet certain eligibility criteria. Properly utilizing deductions are crucial for effective tax planning, as it can lead to substantial tax savings. Understanding and applying the appropriate deductions can help individuals manage their finances better and ensure compliance with tax regulations.