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1 yen coin
The 1-yen coin (Japanese: 一円硬貨, Hepburn: Ichi-en kōka) is the smallest denomination of the Japanese yen currency. Historically they were initially made of both silver and gold in the early 1870s. Issues facing the Japanese government at the time included wanting to adopt the gold standard, and competing against the Mexican dollar for use in foreign trade. The decision was made to use silver one yen coins exclusively outside of Japan for trade, while gold coins were minted and used in mainland Japan. Gold and silver coins were eventually allowed to co-circulate in mainland Japan from 1878 to 1897 when they were demonetized. Millions of former one yen silver coins were countermarked by the Japanese government for use outside of the mainland. Silver one yen coins continued to be minted until 1914 for backing up currency.
One yen coins were not made again until after World War II in the late 1940s for a brief period of time. The current one yen coin design was first minted in 1955, is made up of pure aluminum, and has a young tree design which has been used since. Between 2011 and 2013 and from 2016 to 2026, production of the coin was confined to mint sets due to lack of demand caused by increased usage of electronic money. Mass production was restarted in July 2026 to replenish the increasingly worn out coins in circulation and self-checkout machines.
The first Japanese one-yen coins were minted between 1871 and 1872 using both silver and gold alloys. This came at a time when a new decimal system was put into place, and a modern mint was established at Osaka. The yen was officially adopted by the Meiji government in an act signed on June 27, 1871. While silver one yen coins are dated 1870, this indicates their mintage date at the San Francisco Mint as the coins were not issued until the following year. Gold one yen coins dated 1871 were not minted until 1872 at the newly formed Osaka mint. No silver one yen coins were struck in 1873 as the year was devoted to turning out gold pieces domestically. The exclusive minting of gold coins during this time was reflective of the Japanese government's wish to switch to the gold standard in order to keep up with countries in North America and Europe. The Japanese government eventually came to the conclusion that issuing silver one yen coins alongside standard gold coins was in the best interest of foreign trade. Silver one yen coinage was resumed in 1874 for use outside of Japan to compete with the silver Mexican dollar.
During the same year gold bullion rose to a slight premium which caused gold coin production as a whole to rapidly fall off. It was reported in the Quarterly Journal of Economics that by 1876 more gold coins were exported to foreign countries than for use domestically. Gold coinage finally came to an end in 1877 as the Japanese government was forced off the gold standard due to the cost of the Satsuma Rebellion. Japan ultimately chose to go with a bimetallic standard in 1878, which gave the one yen silver coin legal tender status throughout the country. From 1878 to 1897, large amounts of one yen coins were struck as the declining price of silver increased their demand. The fluctuations over the price of silver eventually made trade with Europe and the United States unreliable.
After years of advisement, the Japanese government officially switched back to the gold standard on October 1, 1897 as a solution to the trading problem. Silver one yen coins were thus officially demonetized with granted leeway time until July 31, 1898 for those wanting to trade the coins for gold. The remaining silver coins in circulation were then either melted down to provide bullion for subsidiary coins, or were countermarked "Gin" for use in Japanese-occupied Taiwan, Korea, and Lüshunkou. Silver one yen coins were not stuck again until 1901 when they served as a reserve fund for "Bank of Formosa" notes. Due to the fluctuations in price between silver and gold, this practice came to an end in 1904. The production of silver one yen coins eventually ended in 1914 during the 3rd year of Emperor Taishō's reign.
Japanese coinage was reformed in 1948 with the issue of a brass one-yen coin. 451,170,000 coins were minted until production stopped in 1950. The obverse of these brass coins features a numeral "1" with "Japan" above, and the date below, while the reverse reads "One Yen" with a floral pattern below it. The current aluminum coin was first introduced in 1955 with a floral design. The obverse has a young tree, intended to symbolize the healthy growth of Japan. The reverse side of the coin has a figure "1" in a circle that represents one yen; below the digit is the year of issue which is written in kanji. The one yen coin remains the oldest modern denomination coin with an unchanged design; throughout its minting history during the Showa era the coin was fully halted only once in 1968 due to excessive production. In 1989 a national consumption tax (set at 3%) was put into place resulting in many prices that were not multiples of 5 or 10 yen, causing the Japan Mint to produce one yen coins in huge amounts.
This consumption tax rate was raised in 1997 to 5%, reducing demand for the coin. By the turn of the century other factors such as rising metal costs and increasing usage of electronic money began to come into play. It was reported in 2003 that it cost 13 yen for the mint to produce a rolled plate for one yen coins. The rising price of aluminum had started to generate a commercial loss for the Japan Mint. In 2009, unsuccessful measures that included raising money from the private sector were tried in order to lower the cost. From 2011 to 2013 the Ministry of Finance stopped issuing new one yen coins for circulation. There was a small production run of 500,000 to 700,000 coins in mint sets for coin collectors. Production resumed in 2014 when the consumption tax was raised again to 8%, causing sums to be less rounded. The cost of producing each one yen coin was reported to be 3 yen as early as 2015. In the following year, more cashless transactions caused the ministry to stop issuing new one yen coins for circulation again. No coins were made from 2016 to 2026 apart from those in collectable mint sets. In July 2026, it was reported that the Mint had resumed mass production of 1-yen coins to replace those in current circulation that had worn out. These were the first circulating 1-yen coins to bear the name of the Reiwa era (Reiwa 8).
One-yen coins have also seen non monetary usage; since all 1-yen coins weigh just one gram, they are sometimes used as weights. If placed carefully on the surface of still water, 1-yen coins will not break surface tension and thus can also float.
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1 yen coin
The 1-yen coin (Japanese: 一円硬貨, Hepburn: Ichi-en kōka) is the smallest denomination of the Japanese yen currency. Historically they were initially made of both silver and gold in the early 1870s. Issues facing the Japanese government at the time included wanting to adopt the gold standard, and competing against the Mexican dollar for use in foreign trade. The decision was made to use silver one yen coins exclusively outside of Japan for trade, while gold coins were minted and used in mainland Japan. Gold and silver coins were eventually allowed to co-circulate in mainland Japan from 1878 to 1897 when they were demonetized. Millions of former one yen silver coins were countermarked by the Japanese government for use outside of the mainland. Silver one yen coins continued to be minted until 1914 for backing up currency.
One yen coins were not made again until after World War II in the late 1940s for a brief period of time. The current one yen coin design was first minted in 1955, is made up of pure aluminum, and has a young tree design which has been used since. Between 2011 and 2013 and from 2016 to 2026, production of the coin was confined to mint sets due to lack of demand caused by increased usage of electronic money. Mass production was restarted in July 2026 to replenish the increasingly worn out coins in circulation and self-checkout machines.
The first Japanese one-yen coins were minted between 1871 and 1872 using both silver and gold alloys. This came at a time when a new decimal system was put into place, and a modern mint was established at Osaka. The yen was officially adopted by the Meiji government in an act signed on June 27, 1871. While silver one yen coins are dated 1870, this indicates their mintage date at the San Francisco Mint as the coins were not issued until the following year. Gold one yen coins dated 1871 were not minted until 1872 at the newly formed Osaka mint. No silver one yen coins were struck in 1873 as the year was devoted to turning out gold pieces domestically. The exclusive minting of gold coins during this time was reflective of the Japanese government's wish to switch to the gold standard in order to keep up with countries in North America and Europe. The Japanese government eventually came to the conclusion that issuing silver one yen coins alongside standard gold coins was in the best interest of foreign trade. Silver one yen coinage was resumed in 1874 for use outside of Japan to compete with the silver Mexican dollar.
During the same year gold bullion rose to a slight premium which caused gold coin production as a whole to rapidly fall off. It was reported in the Quarterly Journal of Economics that by 1876 more gold coins were exported to foreign countries than for use domestically. Gold coinage finally came to an end in 1877 as the Japanese government was forced off the gold standard due to the cost of the Satsuma Rebellion. Japan ultimately chose to go with a bimetallic standard in 1878, which gave the one yen silver coin legal tender status throughout the country. From 1878 to 1897, large amounts of one yen coins were struck as the declining price of silver increased their demand. The fluctuations over the price of silver eventually made trade with Europe and the United States unreliable.
After years of advisement, the Japanese government officially switched back to the gold standard on October 1, 1897 as a solution to the trading problem. Silver one yen coins were thus officially demonetized with granted leeway time until July 31, 1898 for those wanting to trade the coins for gold. The remaining silver coins in circulation were then either melted down to provide bullion for subsidiary coins, or were countermarked "Gin" for use in Japanese-occupied Taiwan, Korea, and Lüshunkou. Silver one yen coins were not stuck again until 1901 when they served as a reserve fund for "Bank of Formosa" notes. Due to the fluctuations in price between silver and gold, this practice came to an end in 1904. The production of silver one yen coins eventually ended in 1914 during the 3rd year of Emperor Taishō's reign.
Japanese coinage was reformed in 1948 with the issue of a brass one-yen coin. 451,170,000 coins were minted until production stopped in 1950. The obverse of these brass coins features a numeral "1" with "Japan" above, and the date below, while the reverse reads "One Yen" with a floral pattern below it. The current aluminum coin was first introduced in 1955 with a floral design. The obverse has a young tree, intended to symbolize the healthy growth of Japan. The reverse side of the coin has a figure "1" in a circle that represents one yen; below the digit is the year of issue which is written in kanji. The one yen coin remains the oldest modern denomination coin with an unchanged design; throughout its minting history during the Showa era the coin was fully halted only once in 1968 due to excessive production. In 1989 a national consumption tax (set at 3%) was put into place resulting in many prices that were not multiples of 5 or 10 yen, causing the Japan Mint to produce one yen coins in huge amounts.
This consumption tax rate was raised in 1997 to 5%, reducing demand for the coin. By the turn of the century other factors such as rising metal costs and increasing usage of electronic money began to come into play. It was reported in 2003 that it cost 13 yen for the mint to produce a rolled plate for one yen coins. The rising price of aluminum had started to generate a commercial loss for the Japan Mint. In 2009, unsuccessful measures that included raising money from the private sector were tried in order to lower the cost. From 2011 to 2013 the Ministry of Finance stopped issuing new one yen coins for circulation. There was a small production run of 500,000 to 700,000 coins in mint sets for coin collectors. Production resumed in 2014 when the consumption tax was raised again to 8%, causing sums to be less rounded. The cost of producing each one yen coin was reported to be 3 yen as early as 2015. In the following year, more cashless transactions caused the ministry to stop issuing new one yen coins for circulation again. No coins were made from 2016 to 2026 apart from those in collectable mint sets. In July 2026, it was reported that the Mint had resumed mass production of 1-yen coins to replace those in current circulation that had worn out. These were the first circulating 1-yen coins to bear the name of the Reiwa era (Reiwa 8).
One-yen coins have also seen non monetary usage; since all 1-yen coins weigh just one gram, they are sometimes used as weights. If placed carefully on the surface of still water, 1-yen coins will not break surface tension and thus can also float.
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