Listed below are the National Holidays in Japan. On these days not only the University but most government and municipal offices and banks are also closed.
| Month | Day | Holiday | Reason |
| January | 1 | New Year's Day | Celebrate the New Year |
| 2nd Monday | Coming-of-Age Day | To honor those who reached the age of 20 | |
| February | 11 | National Foundation Day | To pray for the development of the country |
| 23 | Emperor’s Birthday | To celebrate the birthday of the reigning Emperor | |
| March | Around 20 | Vernal Equinox Day | Day for thanking the nature |
| April | 29 | Showa Day | Birthday of the Shōwa Emperor |
| May | 3 | Constitution Day | Day Japan's new Constitution was founded |
| 4 | Green Day | To think about the nature around us | |
| 5 | Children's Day | To wish happiness for our children | |
| July | 3rd Monday | Sea Day | To thank the sea |
| August | 11 | Mountain Day | To thank the mountain |
| September | 3rd Monday | Senior Citizen’s Day | To think about and respect our elderly |
| Around 23 | Autumnal Equinox Day | To think and pray about our ancestors | |
| October | 2nd Monday | Health-Sports Day | To encourage the nation to enjoy sports |
| November | 3 | Culture Day | To celebrate the development of culture |
| 23 | Labor Thanksgiving Day | To recognize and thank the nation's labor force |
- When a holiday falls on a Sunday the following Monday will be a holiday.
- May 4th will also be a holiday because of the law concerning National Holidays.
- Normally in Japan, banks, post offices, and companies are closed on Saturdays, Sundays, and holidays but department stores and shops are open.
- In addition to the holidays listed above, many companies and stores are closed during “Obon” in the middle of August.
- Many banks, companies, and stores will also be closed at the beginning and end of the year, especially January 1st to 3rd.