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245 business days
2026 is a 365-day year in Japan with 261 weekdays (Mondays to Fridays). After removing 16 national public holiday dates, 245 working days remain. The fullest month is December with 23 business days; the leanest is February with 18. If regional and sector-specific holidays are also excluded, the total falls to 245.
| Month | Calendar days | Business days | Holidays deducted |
|---|---|---|---|
| January 2026 | 31 | 20 | 2 |
| February 2026 | 28 | 18 | 2 |
| March 2026 | 31 | 21 | 1 |
| April 2026 | 30 | 21 | 1 |
| May 2026 | 31 | 18 | 3 |
| June 2026 | 30 | 22 | 0 |
| July 2026 | 31 | 22 | 1 |
| August 2026 | 31 | 20 | 1 |
| September 2026 | 30 | 20 | 2 |
| October 2026 | 31 | 21 | 1 |
| November 2026 | 30 | 19 | 2 |
| December 2026 | 31 | 23 | 0 |
| Date | Day | Holiday | Deducted from working days |
|---|---|---|---|
| 2026-01-01 | Thursday | 元日 | Yes |
| 2026-01-12 | Monday | 成人の日 | Yes |
| 2026-02-11 | Wednesday | 建国記念の日 | Yes |
| 2026-02-23 | Monday | 天皇誕生日 | Yes |
| 2026-03-20 | Friday | 春分の日 | Yes |
| 2026-04-29 | Wednesday | 昭和の日 | Yes |
| 2026-05-04 | Monday | みどりの日 | Yes |
| 2026-05-05 | Tuesday | こどもの日 | Yes |
| 2026-05-06 | Wednesday | 憲法記念日 | Yes |
| 2026-07-20 | Monday | 海の日 | Yes |
| 2026-08-11 | Tuesday | 山の日 | Yes |
| 2026-09-21 | Monday | 敬老の日 | Yes |
| 2026-09-23 | Wednesday | 秋分の日 | Yes |
| 2026-10-12 | Monday | スポーツの日 | Yes |
| 2026-11-03 | Tuesday | 文化の日 | Yes |
| 2026-11-23 | Monday | 勤労感謝の日 | Yes |