Showa to Western Year Converter — 昭和 西暦 変換
昭和を西暦に変換 — Convert Showa years (昭和1年–64年) to 1926–1989
Convert any Showa era year (昭和) to the Western Gregorian calendar instantly.
The Showa era ran from 1926 to 1989 — enter any Showa year from 1 to 64 to
find the Western equivalent. Free, no login required.
Complete Showa Year Chart — 昭和 西暦 早見表 (全64年)
| Showa (昭和) |
Western Year |
Showa (昭和) |
Western Year |
| 昭和1年 | 1926 | 昭和33年 | 1958 |
| 昭和2年 | 1927 | 昭和34年 | 1959 |
| 昭和3年 | 1928 | 昭和35年 | 1960 |
| 昭和4年 | 1929 | 昭和36年 | 1961 |
| 昭和5年 | 1930 | 昭和37年 | 1962 |
| 昭和6年 | 1931 | 昭和38年 | 1963 |
| 昭和7年 | 1932 | 昭和39年 | 1964 |
| 昭和8年 | 1933 | 昭和40年 | 1965 |
| 昭和9年 | 1934 | 昭和41年 | 1966 |
| 昭和10年 | 1935 | 昭和42年 | 1967 |
| 昭和11年 | 1936 | 昭和43年 | 1968 |
| 昭和12年 | 1937 | 昭和44年 | 1969 |
| 昭和13年 | 1938 | 昭和45年 | 1970 |
| 昭和14年 | 1939 | 昭和46年 | 1971 |
| 昭和15年 | 1940 | 昭和47年 | 1972 |
| 昭和16年 | 1941 | 昭和48年 | 1973 |
| 昭和17年 | 1942 | 昭和49年 | 1974 |
| 昭和18年 | 1943 | 昭和50年 | 1975 |
| 昭和19年 | 1944 | 昭和51年 | 1976 |
| 昭和20年 | 1945 | 昭和52年 | 1977 |
| 昭和21年 | 1946 | 昭和53年 | 1978 |
| 昭和22年 | 1947 | 昭和54年 | 1979 |
| 昭和23年 | 1948 | 昭和55年 | 1980 |
| 昭和24年 | 1949 | 昭和56年 | 1981 |
| 昭和25年 | 1950 | 昭和57年 | 1982 |
| 昭和26年 | 1951 | 昭和58年 | 1983 |
| 昭和27年 | 1952 | 昭和59年 | 1984 |
| 昭和28年 | 1953 | 昭和60年 | 1985 |
| 昭和29年 | 1954 | 昭和61年 | 1986 |
| 昭和30年 | 1955 | 昭和62年 | 1987 |
| 昭和31年 | 1956 | 昭和63年 | 1988 |
| 昭和32年 | 1957 | 昭和64年 | 1989 |
昭和64年 (1989) lasted only 7 days — January 1–7, 1989.
The Heisei era began January 8, 1989.
How to Convert Showa Years to Western Years (昭和 西暦 変換方法)
Converting a Showa year (昭和) to the Western Gregorian calendar is
straightforward: add 1925 to the Showa year number.
For example, Showa 30 + 1925 = 1955, and Showa 64 + 1925 = 1989.
This formula works for all 64 years of the Showa era. To go the other
direction — Western year to Showa — subtract 1925. For instance,
1960 − 1925 = Showa 35.
The Showa era (昭和, meaning "Radiant Japan") began on December 25,
1926, when Emperor Hirohito ascended to the throne following the death
of Emperor Taisho. It ended on January 7, 1989, when Emperor Hirohito
passed away. The very next day, January 8, 1989, marked the start of
the Heisei era.
About the Showa Era (昭和時代)
At 64 years, the Showa era is the longest imperial era in Japanese
recorded history. It covered one of the most turbulent and
transformative periods in Japan's modern history — from the militarist
expansion of the 1930s and World War II (Showa 20 = 1945), through
the postwar occupation and recovery, to Japan's remarkable economic
rise in the 1960s–80s. Many official Japanese documents, historical
records, and personal documents from this period use the Showa year
system.
If you are reading a Japanese document, form, or certificate that
shows a year in 昭和 format, use the converter above or the complete
reference table to find the Western equivalent instantly. For Heisei
era dates, see the
Heisei era converter.
For current Reiwa dates, use the
main era date converter.
Era date information sourced from the
Japan Cabinet Office.
Frequently Asked Questions — Showa Era (昭和)
-
How do I convert Showa year to Western year?
To convert any Showa year to a Western year, add 1925 to the Showa
year number. For example, Showa 64 + 1925 = 1989, Showa 30 + 1925
= 1955, Showa 1 + 1925 = 1926. The Showa era ran from December 25,
1926 to January 7, 1989.
-
What years did the Showa era cover?
The Showa era (昭和) ran from December 25, 1926 to January 7, 1989
— a span of 64 years, making it the longest imperial era in Japanese
history. Showa 1 corresponds to 1926, and Showa 64 corresponds to
1989. Emperor Hirohito reigned throughout the entire Showa period.
-
What is Showa 64 in Western year?
Showa 64 is 1989 in the Western calendar. However, Showa 64 lasted
only 7 days — from January 1 to January 7, 1989. Emperor Hirohito
passed away on January 7, 1989, and the Heisei era began the
following day, January 8, 1989.
-
What is Showa 30 in Western year?
Showa 30 is 1955 in the Western calendar. Use the formula: Showa
year + 1925 = Western year. So Showa 30 + 1925 = 1955. This formula
works for all Showa years from Showa 1 (1926) to Showa 64 (1989).
-
How many years did the Showa era last?
The Showa era lasted 64 years, from December 25, 1926 to January 7,
1989. At 64 years, it is the longest imperial era in Japanese
recorded history, spanning the reign of Emperor Hirohito through
World War II, Japan's postwar recovery, and its economic rise.