Age and school-year estimates for those born in 1900

Man-nenrei, kazoedoshi, wareki, eto, and school years for people born in 1900, as of 30 August 2026. If you know the month and day, use the age calculator (this page assumes 2 April for a year-level lookup).

As-of date：30 August 2026(updated to today when you view the page)

Legal age (today)

126years

Legal age (31 Dec)

126years

Kazoedoshi

127years

Wareki (assumes 2 April)

明治33年4月2日

Eto

庚子（子）

Elementary school

April 1907

Junior high

April 1913

High school

April 1916

High-school graduation

March 1919

Kanreki (approx. year)

1959

Facts on this page

・Legal age as of 30 August 2026 is 126

・Legal age on 31 December 2026 is 126

・Kazoedoshi is 127

・Wareki date of birth (assumes 2 April) is 明治33年4月2日

・Eto is 庚子 (子)

・Elementary school starts April 1907

・Junior high starts April 1913

・High school starts April 1916

・High-school graduation is March 1919

・Kanreki (kazoedoshi) approx. year is 1959

・Yakudoshi (male, kazoedoshi 127): none

・Yakudoshi (female, kazoedoshi 127): none

Assumptions

For searches without a month and day, we assume a 2 April birthday.

The static as-of date (build time) is 30 August 2026. After load we update it to today.