Age Chart converts birth years to ages, Japanese era years and zodiac signs.

It is an independent site. All values are calculated from the calendar and the rules cited below.

Calculated from the calendar; legal basis from e-Gov (Government of Japan).

How this site works

Once a day an automated job downloads the latest public data from the sources listed below, checks it and rebuilds these static pages. Nothing is invented or estimated by us: every number comes from a cited source.

Data sources

• 元号法 (Era Name Act), e-Gov — Laws are not subject to copyright (Copyright Act Art. 13)
• 元号を改める政令 (1989, 2019), e-Gov — Cabinet orders; not subject to copyright
• 学校教育法 (School Education Act), e-Gov — Laws are not subject to copyright
• 年齢計算ニ関スル法律 (Act on Age Calculation), e-Gov — Laws are not subject to copyright
• 民法 (Civil Code) Art. 4, e-Gov — Laws are not subject to copyright

Languages

The interface is available in 14 languages and was translated by hand. Where free text from a source is translated, it is done by offline machine translation and labelled as such.

Independence

Independent site, not affiliated with the data providers named here. For information only. Figures are reproduced from the cited sources, may be delayed or contain errors, and are not advice of any kind. Always check the original source.

Using the data

Please follow each source's own terms when reusing the data and credit the original publisher.

Affiliate links

Some Japanese pages include Rakuten Affiliate and (when enabled) Amazon Associates search links. They are separate from the price data on this site and do not show store prices. See the privacy policy for details.

As an Amazon Associate I earn from qualifying purchases.

Image credits

The header illustration is original artwork made for this site.