Age, zodiac and leap year

7 years before, NOT Leap year, Japanese Zodiac is Boar

Years before/after are calculated from Jan. 1 of the current year to Jan. 1 of the target year.

Conversion methods between A.D. and Japanese eras

This table summarizes simple ways to convert between A.D. years and Japanese eras.

A.D.→Heisei	Plus 12 from A.D.'s lower 2 digits.	Ex. 2019→19+12=31→Heisei 31
Heisei→A.D.	Subtract 12, then plus 2000.	Ex. Heisei 10→10-12=-2→-2+2000=1998→A.D. 1998
A.D.→Reiwa	Subtract 18 from A.D.'s lower 2 digits.	Ex. 2019→19-18=1→Reiwa 1st year
Reiwa→A.D.	Plus 18 and add "20" to its head.	Ex. Reiwa 1st year→1+18=19→A.D. 2019

Each period of Modern Japanese eras.

List of period of each Japanese era.(From Meiji to now)

Meiji	25/01/1868(Sat)～ 30/07/1912(Tue)
Taisyo	30/07/1912(Tue)～ 25/12/1926(Sat)
Syowa	25/12/1926(Sat)～ 07/01/1989(Sat)
Heisei	08/01/1989(Sun)～ 30/04/2019(Tue)
Reiwa	01/05/2019(Wed)～

FAQ

What A.D. year is Heisei 31, Reiwa 1st year?

Heisei 31, Reiwa 1st year is A.D. 2019.

How do I convert Japanese eras to A.D. years?

Use the era-specific formula, such as adding 18 for Reiwa or subtracting 12 then adding 2000 for Heisei.