Japan School Age and Grade Calculator
Enter a birth date and the year in which the school year begins. The result shows the standard elementary, junior-high, or high-school grade and the child's expected elementary-school entry year.
Contemporary standard-cohort estimate for school years beginning from 2020 through 2040 and birth dates from 2000 through 2039. It assumes one grade per year with no repetition or acceleration. Actual placement can differ for transfers, international or private schools, special educational arrangements, upper-secondary admission, and decisions by the school or local board of education.
Enter your scenario
Use the details that match your situation. Your estimate stays in this browser.
How this estimate works
- A standard Japanese grade cohort contains children born from April 2 of one year through April 1 of the next year; an April 1 birth is therefore in the older cohort.
- The calculator derives the expected April elementary-school entry year from that boundary, then compares it with the selected school-year start.
- Years one through six map to elementary school, seven through nine to junior high school, and ten through twelve to the ordinary high-school progression.
Official school-entry references
- MEXT: why one grade runs from April 2 births through April 1 births
- MEXT: multilingual guide for foreign students starting school in Japan
MEXT explains the national age and school-year boundary. Families entering or transferring into a school should confirm placement and enrollment procedures with the municipality and school.
Frequently asked questions
Why are April 1 and April 2 birthdays placed in different Japanese school grades?
Under the official age rule, a child born April 1 reaches the relevant age at the end of March 31 and joins the older cohort. The next cohort begins with April 2 births.
Does the result guarantee a child's actual school placement?
No. It shows the standard national cohort progression. Transfers, international schools, admission decisions, individual circumstances, and local arrangements can produce a different placement.