Birth-year overview
Pick a Gregorian birth year for man-nenrei, kazoedoshi, wareki, eto, and school-year estimates. Each page assumes a 2 April birthday for a year-level lookup.
Pick a Gregorian birth year for man-nenrei, kazoedoshi, wareki, eto, and school-year estimates (each page assumes a 2 April birthday).
2026
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
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1911
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1901
1900
What the year pages assume
For searches without a month and day, we assume 2 April (near the school cutoff). For exact man-nenrei, use the age calculator with a full birth date.
Frequently asked questions
Why assume 2 April?
It sits near the school-year boundary, so year-level age and school estimates line up more usefully.