Business days in Japan in 2027, by month

Japan has 245 business days in 2027, excluding weekends and national holidays.

Business days per month, 2027
Month	Weekends and holidays only	Banks (Dec 31–Jan 3)	Government offices (Dec 29–Jan 3)
January	19	19	19
February	18	18	18
March	22	22	22
April	21	21	21
May	18	18	18
June	22	22	22
July	21	21	21
August	21	21	21
September	20	20	20
October	20	20	20
November	20	20	20
December	23	22	20
Year	245	244	242

Year-end closures (banks Dec 31–Jan 3, government offices Dec 29–Jan 3) are not national holidays, and companies set their own.

National holidays and other days off in 2027

Fri, January 1, 2027 New Year's Day
Mon, January 11, 2027 Coming of Age Day
Thu, February 11, 2027 National Foundation Day
Tue, February 23, 2027 Emperor's Birthday
Sun, March 21, 2027 Vernal Equinox Day
Mon, March 22, 2027 Substitute holiday / Citizens' Holiday
Thu, April 29, 2027 Showa Day
Mon, May 3, 2027 Constitution Memorial Day
Tue, May 4, 2027 Greenery Day
Wed, May 5, 2027 Children's Day
Mon, July 19, 2027 Marine Day
Wed, August 11, 2027 Mountain Day
Mon, September 20, 2027 Respect for the Aged Day
Thu, September 23, 2027 Autumnal Equinox Day
Mon, October 11, 2027 Sports Day
Wed, November 3, 2027 Culture Day
Tue, November 23, 2027 Labor Thanksgiving Day

Count business days for any period Business days in 2026

Result

How it is calculated

The number of days is the end date minus the start date. Under article 140 of Japan’s Civil Code, the first day of a period counted in days is not counted unless the period starts at midnight, and that is the default here. With “Count the first day”, the start date counts as day 1.

Business days exclude Saturdays, Sundays, and the national holidays and other days off in the Cabinet Office holiday list, including substitute holidays and days between two holidays. For years the list does not cover yet, holidays are estimated from the Act on National Holidays and the special laws for imperial ceremonies, with the equinox days taken from the National Astronomical Observatory of Japan’s solar terms. This estimate matches the Cabinet Office list on every day from 1955 to 2027.

Year-end closures are not national holidays. Banks close from December 31 to January 3 under the Banking Act Enforcement Order article 5, and government offices from December 29 to January 3 under the Act on Holidays of Administrative Organs article 1.

Source (in Japanese): 内閣府「国民の祝日について」syukujitsu.csv
In effect from: 1955-01-01
Last checked: 2026-10-27

Source (in Japanese): 国民の祝日に関する法律（昭和二十三年法律第百七十八号）（e-Gov 法令検索）
In effect from: 2020-01-01
Last checked: 2026-10-28

Source (in Japanese): 祝日に関する特別法（皇室の儀式の日を休日とする各法律、平成27年法律第33号東京オリンピック・パラリンピック特別措置法）（e-Gov 法令検索）
In effect from: 2020-12-28
Last checked: 2026-10-28

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FAQ

What does "Count the first day" mean?

The start date counts as day 1. From January 1 to January 3 is 2 days without the first day and 3 days with it. Contract and legal periods in Japan normally leave out the first day unless the period starts at midnight (Civil Code article 140).

Which days are not business days?

Saturdays, Sundays, and the national holidays and other days off published by the Cabinet Office, including substitute holidays. If you choose a year-end closure, those days are left out too. Company-specific days off are not included.

Does it include holidays in future years?

Yes. For years the Cabinet Office has not announced, holidays are estimated from Japan's holiday law and the National Astronomical Observatory's equinox data, and the result says so. The equinox holidays become official each February for the following year, when the observatory's almanac is published in the Official Gazette.