What Are Modern Coins?
Japan's modern coins refer to those issued from the Meiji era through the Shōwa era, following the introduction of a Western-style machine-struck coinage system under the New Currency Regulations (Shinkka Jōrei) promulgated in Meiji 4 (1871). This system completely reformed the complex monetary framework of the Edo period and established a modern national currency system conforming to international standards. The decimal system of "yen, sen, and rin" was adopted, and gold, silver, and copper coins were issued in a unified manner under the gold standard. Because they were manufactured by machine striking, their specifications were extremely precisely standardized, ensuring uniformity of quality. This is also a notable characteristic in the Guide to Identifying Counterfeits and Altered Coins: authentication is comparatively easier than with hand-struck coins. Modern coins transcend their function as mere currency and can be said to symbolize Japan's modernization. Their manufacturing technology and system were on a par with world standards of the time, laying an indispensable foundation for economic stability and the development of international trade. The coins of this era captivate many collectors for their historical significance and refined craftsmanship.
The Meiji-Era Monetary System
The Meiji government fundamentally reformed the diverse and complex monetary system of the former shogunate era. Based on the New Currency Regulations, a gold standard was established with 1 gold yen = 1.5 g of pure gold as the benchmark, giving Japan's currency international credibility. Five denominations of gold coins were issued: 20 yen, 10 yen, 5 yen, 2 yen, and 1 yen. The Types and Values of Meiji Gold Coins in particular are held in very high regard in today's collecting market. Silver coins issued included 1 yen, 50 sen, 20 sen, 10 sen, and 5 sen. Among these, the old 1-yen silver coin was also used in trade settlements, serving a role as an international currency. Copper coins of 2 sen, 1 sen, half-sen, and 1 rin circulated to support small transactions. All of these coins were manufactured at the Osaka Mint under the guidance of British engineers, and their quality fully met the international standards of the time. The Meiji-era monetary system became the cornerstone that led Japan's economy toward modernization.
Popular Areas in the Collecting Market
In the modern coin collecting market, gold coins issued in the early Meiji era enjoy particularly high popularity. Among them, the old 20-yen gold coin issued in Meiji 3 is regarded as the pinnacle of Japanese modern coins for its rarity and historical value. Fine specimens in good condition can fetch tens of millions of yen. This is because the Factors That Determine the Value of Old Coins are greatly influenced by mintage figures and state of preservation. Among silver coins, the old 1-yen silver coin, commonly known as the "Ryū Ichi-en" (dragon 1-yen), is extremely popular. Even minor differences in the year or in the dragon design can significantly affect value. Coins from years with extremely low mintages—such as the Meiji 10 (year) 20-sen silver coin and the Meiji 13 (year) 10-sen silver coin—are traded at high prices due to their rarity. Silver coins from the Taishō era through the early Shōwa era are also popular across a wide range of collectors, from beginners to advanced enthusiasts, as many can be acquired at reasonable price points. Their historical background, beautiful designs, and relative accessibility make them a suitable entry point into collecting.
The Osaka Mint and British Engineers
The Osaka Mint (initially called the造幣寮, Zōhei-ryō) opened in Meiji 4 (1871). It was an indispensable facility for modernizing Japan's monetary system. The Meiji government invited many foreign specialists from Britain—including mint adviser T. W. Kinder—to introduce cutting-edge minting technology. They provided guidance in areas such as engraving, casting, and assaying, and also contributed to training Japanese engineers. Precision steam-powered minting machinery imported from Wharton & Co. of Birmingham was installed, establishing a mass-production system for Western-style machine-struck coins. This set a clear distinction from the hand-struck coins of the Edo period, enabling the stable supply of uniform, high-quality coinage. The Osaka Mint served not merely as a place for manufacturing coins, but as an important facility symbolizing the modernization of Japan's industrial technology.
The Fineness and Specification System of Modern Coins
The New Currency Regulations strictly defined the fineness and specifications of modern coins. Gold coins were specified at gold 900 / copper 100, and silver coins at silver 900 / copper 100 (subsidiary silver coins at 800), guaranteeing high purity. In terms of weight, 1 gold yen = 1.67 g and 1 silver yen = 26.96 g were set as the benchmarks, with each denomination designed in a clear whole-number ratio. This precise design was extremely important for enhancing the reliability of the currency. All coins issued underwent rigorous inspection—"shikin" (assaying / fineness inspection) and "yobiry ō" (weight inspection)—before being released into circulation. This guaranteed that coin quality met international standards, establishing the highest level of quality control in the East Asian region at the time. This strict standard forms the foundation for maintaining value over the long term, provided that the Proper Storage Methods for Old Coins are observed.
Changes in Fineness During the Taishō and Shōwa Eras
After World War I in the Taishō era, a worldwide rise in silver prices occurred. As a result, Japan's subsidiary silver coins faced a situation known as "face-value depreciation" (gakumen-ware), in which their bullion value exceeded their face value. In response, subsequent revisions to the coinage law progressively reduced the fineness of subsidiary silver coins. Furthermore, from Shōwa 13 onward, a transition to cupro-nickel coins began, and the circulation of silver coins gradually decreased. Under the wartime regime of World War II, shortages of metallic materials became severe, and by Shōwa 18, coins made from unusual materials—such as aluminum and even ceramic—came to be issued. This transition in fineness is closely linked to the assessment of coin rarity. It is one of the reasons that gold and silver coins from the high-fineness period spanning the Meiji era through the early Taishō era command particularly high premiums. This transition also provides important historical context for understanding the How to Read Old Coin Market Cycles.
International Certification by PCGS and NGC
PCGS (Professional Coin Grading Service) and NGC (Numismatic Guaranty Corporation), the leading American coin grading services, officially include Japanese modern coins among their certification subjects. Coins certified by these services are encapsulated in special plastic cases called "slabs," with their grade clearly indicated. This enables them to be traded with confidence under a common evaluation standard in markets around the world. Grades are assessed on the MS (Mint State) 70-point scale; coins graded MS65 and above are called "Gem" class and carry substantial premiums. At international auctions—such as Heritage Auctions and Stack's Bowers Galleries—demand from Asian collectors is strong, and high-grade coins tend to attract competitive bidding. Understanding the Practical Guide to Old Coin Grading is therefore indispensable for investors.
Basic Storage and Measures Against Silver Toning
Proper storage is indispensable for maintaining the value of old coins. Gold coins are chemically very stable and, in an appropriate environment, pose little concern for discoloration. Silver coins, however, react with sulfur compounds in the air and are prone to developing "blackening" (toning). The basic measure to prevent this is storage in a sealed container with a desiccant. Of particular note is the use of PVC (polyvinyl chloride) flips or cases, which must never be used, as they react chemically with silver and accelerate discoloration. Polishing or cleaning the surface of coins is also strictly prohibited. Attempting to artificially restore luster will result in a "CLEANED" designation at the time of grading, drastically reducing the coin's monetary value. Natural toning, on the other hand, may actually be evaluated as an added value that tells the history of the coin. For details, please refer to the Old Coin Storage and Maintenance Guide.
Market Trends and Long-Term Price History
The domestic market for modern coins has been steadily active since the 2010s, driven by the entry of inbound collectors and growing global awareness of inflation. In particular, Meiji gold coins graded MS64 or higher have been reported to have risen 1.5 to 2 times in value over the past five years, with their asset value being reassessed. Looking ahead, given the anticipated increase in demand from wealthy Asian collectors and the fact that the number of coins available to the market is fixed, prices for rare-date coins and high-grade pieces are expected to continue rising. However, while market liquidity is higher than for old coins in general, short-term buying and selling is not advisable. A long-term investment strategy premised on holding for several years would be prudent. Making use of ITTENDO's Check Price Trends with the Market Chart function and staying constantly informed of market movements is also important.