| January | New Year’s Day | 2023-01-01 | Legal holidays |
| New Year’s Day | 2023-01-02 | Legal holidays | |
| January 2 Bank Holiday | 2023-01-02 | bank holidays | |
| January 3 Bank Holiday | 2023-01-03 | bank holidays | |
| Coming of Age Day | 2023-01-09 | Legal holidays | |
| February | National Foundation Day | 2023-02-11 Saturday | Legal holidays |
| Valentine’s Day | 2023-02-14 Tuesday | Holidays or anniversaries | |
| Emperor’s Birthday | 2023-02-23 Thursday | Legal holidays | |
| March | Dolls’ Festival/Girls’ Festival | 2023-03-03 Friday | Holidays or anniversaries |
| Spring Equinox | 2023-03-21 Tuesday | Legal holidays | |
| April | Shōwa Day | 2023-04-29 Saturday | Legal holidays |
| May | Constitution Memorial Day | 2023-05-03 Wednesday | Legal holidays |
| Greenery Day | 2023-05-04 Thursday | Legal holidays | |
| Children’s Day | 2023-05-05 Friday | Legal holidays | |
| July | Star Festival | 2023-07-07 Friday | Holidays or anniversaries |
| Sea Day | 2023-07-17 Monday | Legal holidays | |
| August | Hiroshima Memorial Day | 2023-08-06 Sunday | Holidays or anniversaries |
| Nagasaki Memorial Day | 2023-08-09 Wednesday | Holidays or anniversaries | |
| Mountain Day | 2023-08-11 Friday | Legal holidays | |
| September | Respect for the Aged Day | 2023-09-18 Monday | Legal holidays |
| Autumn Equinox | 2023-09-23 Saturday | Legal holidays | |
| October | Health and Sports Day | 2023-10-09 Monday | Legal holidays |
| November | Culture Day | 2023-11-03 Friday | Legal holidays |
| 7-5-3 Day | 2023-11-15 Wednesday | Holidays or anniversaries | |
| Labor Thanksgiving Day | 2023-11-23 Thursday | Legal holidays | |
| December | Christmas | 2023-12-25 Monday | Holidays or anniversaries |
| December 31 Bank Holiday | 2023-12-31 Sunday | bank holidays |
