Identify the year

on japoneses coins

The numbers are written like that on the coins:

Example to understand

Emperor and reign	Reign name	Type 1	Type 2	Reign years
Mutsuhito 1867-1912	Meiji			1-45
Yoshihito 1912-1926	Taisho			1-15
Hirohito 1926-1989	Showa			1-64
Akihito 1989-	Heisi			1-