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Japan Business Days Calculator & Calendar 2026

Easily calculate working days, weekends, public holidays, and business days for Japan. Use our free calculator to find long weekends and plan ahead.

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Long Weekends

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Automatically find consecutive days off combining weekends and public holidays across the whole year.

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Public Holidays 2026
Date Holiday Name
Jan 1, 2026元日
Jan 2, 2026銀行休業日
Jan 3, 2026銀行休業日
Jan 12, 2026成人の日
Feb 11, 2026建国記念の日
Feb 23, 2026天皇誕生日
Mar 20, 2026春分の日
Apr 29, 2026昭和の日
May 3, 2026憲法記念日
May 4, 2026みどりの日
May 5, 2026こどもの日
May 6, 2026憲法記念日 (振替休日)
Jul 20, 2026海の日
Aug 11, 2026山の日
Sep 21, 2026敬老の日
Sep 22, 2026国民の休日
Sep 23, 2026秋分の日
Oct 12, 2026スポーツの日
Nov 3, 2026文化の日
Nov 23, 2026勤労感謝の日
Dec 31, 2026大晦日

Business Days Calculator

Add / Subtract Business Days

About the Japan Business Days Calculator

Last Updated: July 2026

The Japan Business Days Calculator is a free, web-based utility designed to help professionals, project managers, and HR teams accurately count the number of working days between two dates. Unlike a standard calendar, this tool automatically excludes the standard Saturday and Sunday weekend, along with 21 major regional public holidays (such as こどもの日) observed in Japan during 2026.

Why calculate working days?

  • Project Planning: Determine realistic project delivery timelines based on actual working hours.
  • Leave Management: Calculate how many annual leave days are consumed when booking a vacation over a period that includes weekends and public holidays.
  • Financial & Legal Contracts: Many SLAs, contracts, and financial settlements are defined strictly by "business days" rather than calendar days.
Data Source: Holiday data is aggregated from official Japan government gazettes and financial market schedules.

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Frequently Asked Questions (Japan)

How many business days are there in a year? +
The number of business days in Japan depends on the total number of weekdays (excluding Saturday and Sunday) as well as the 21 public holidays observed. Use the calculator above to determine the exact number of business days for any specific date range.
Can public holidays affect project deadlines? +
Yes. Public holidays are typically excluded from business day calculations, which can extend project timelines, contract deadlines, and delivery schedules. Factoring in holidays helps create more accurate plans.
Why do companies use business days instead of calendar days? +
Business days reflect actual working days when offices, banks, and organizations are operating. Using business days provides more realistic timelines for projects, contracts, payments, and service-level agreements.
Can I add or subtract business days from a date? +
Yes. This calculator can determine a future or past date by adding or subtracting a specified number of business days while automatically excluding weekends and public holidays.
Are business days the same in every country? +
No. Different countries may observe different public holidays and weekend structures. While many countries use Saturday and Sunday as weekends, others may follow different schedules. This calculator automatically adjusts based on the selected country.
What is the difference between a business day and a calendar day? +
A calendar day includes every day on the calendar, including weekends and public holidays. A business day includes only official working days and excludes weekends and recognized public holidays.
How do weekends affect business day calculations? +
Weekends are excluded from business day calculations. For example, if a task starts on Friday and requires three business days, the weekend is skipped and the due date becomes Wednesday.
Can I calculate business days between two dates? +
Yes. Simply select a start date and end date, and the calculator will determine the number of business days between them while excluding weekends and applicable public holidays.

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