When was my Yairi made?

By reading the number stamped on the heel block of your Yairi, you can tell in which year it was made. The first two numbers correspond to the year of the Emperor of Japan at that time. (See chart below.) The second two numbers refer to the month of production.

A.D.	Emperor	Year
1970	Showa	45
1971		46
1972		47
1973		48
1974		49
1975		50
1976		51
1977		52
1978		53
1979		54
1980		55
1981		56
1982		57
1983		58
1984		59
1985		60
1986		61
1987		62
1988		63
1989	Heisa	1
1990		2
1991		3
1992		4
1993		5
1994		6
1995		7
1996		8
1997		9
1998		10
1999		11
2000		12
End of Emperor Date Code
2001		01
2002		02
2003		03
2004		04
2005		05
etc.