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Shōwa 21 in the Western calendar
昭和二十一年
=
1946
Year 21 of the Shōwa era is 1946 in the Western calendar.
Western year
1946
Kanji form
昭和二十一年
as stamped on coins
Abbreviation
S21
on licenses & forms
Zodiac
丙戌 Fire Dog
Era position
Year 21 of 64
Shōwa era (Dec 25, 1926 – Jan 7, 1989)
Age today
How to read it
On coins and formal documents the year is written 昭和二十一年 — 二十一 is two-ten-one, so it reads 21.
Quick conversion rule: Shōwa year + 1925 = Western year (Shōwa 21 + 1925 = 1946).