--- title: "The Value of Keicho Oban Gold Coins and Basic Appraisal Knowledge" url: "https://ittendo.com/en/article/news-jp-1387-35dde032" site: "ITTENDO" type: "article" category: "江戸金貨" published: "2026-09-18T22:00:00Z" source: "一点堂編集部" source_url: "https://ittendo.com/" lang: "en" --- # The Value of Keicho Oban Gold Coins and Basic Appraisal Knowledge > The Keicho Oban gold coin symbolizes the early Edo period's monetary system and played a crucial role in the Tokugawa shogunate's finances. Its value is determined by elements like the "juryo" inscription and the Goto family's seal, necessitating specialized appraisal. Preservation requires meticulous care, and appropriate storage methods help maintain its value. The Keicho Oban gold coin, an iconic gold coin from the early Edo period, was first minted in 1601 by the order of Tokugawa Ieyasu. --- ## Symbol of the Early Edo Period, Keicho Oban Gold Coin The minting of the Keicho Oban gold coin commenced in 1601, the 6th year of Keicho, by the order of Tokugawa Ieyasu. This oban coin was a symbolic establishment of the early Edo period's monetary system, playing a role in unifying various currencies circulated in different regions. It marked an important step in establishing the Tokugawa shogunate's gold coin minting system. The standard weight of this oban is approximately 165g, with a gold fineness of about 67%, equivalent to approximately 110g of pure gold. The obverse side features the "juryo" inscription and seal by the Goto family of the gold mint, giving it a solemn impression. The Keicho Oban gold coin was the first systematically issued oban coin by the Edo shogunate, laying the foundation for all subsequent oban coins with its historical significance. Its dignified appearance appropriately symbolizes the unification of Japan under Tokugawa, playing an essential role in supporting the economic foundation of the Edo period. The size of the Keicho Oban is about 155mm by 95mm, so large that it doesn't fit in the palm of the hand. Although its gold fineness is slightly lower than that of the Tensho Oban, it was part of the shogunate's policy aiming for stable currency supply and economic stabilization. During the long minting process, later-minted specimens show slight variations in fineness and weight. Especially during the Genroku recoinage, there are examples with further reduced fineness. These subtle changes are crucial when determining the [factors that decide the value of old coins](/coinpedia/basics-001-value-drivers). Lower-fineness late-period specimens may have a slightly whitish appearance, necessitating precise measurements. The Keicho Oban gold coin holds a significant place in the Edo period's monetary system and is of interest to collectors and researchers alike. For more details, see [Keicho Oban Gold Coin](/coinpedia/edo-gold-004-keicho-oban). ## Historical Significance of Bakufu Finances and Keicho Oban The Keicho Oban played an exceedingly important role in the finances of the Edo shogunate. It served purposes beyond being a high-value currency, such as rewards to daimyo, offerings to the imperial court, and loans to various fiefdoms. These diverse uses reflected the shogunate's political intentions and financial conditions, especially in the early Edo period when a large number were minted, demonstrating the shogunate's authority and financial power to the world. The Keicho Oban occupies a special position in Japan's monetary history, as explained in the [overview of Edo gold coins](/coinpedia/edo-gold-001-overview). Its minting continued until the Genroku recoinage, with the total number minted reaching tens of thousands. This historical background continues to attract modern collectors and contributes to the evaluation of the Keicho Oban. Additionally, due to its long minting period, the Keicho Oban is categorized into three periods: early, middle, and late, each with distinct characteristics. Early Obans are noted for their coarse finish, reflecting the developing minting technologies of the time. As techniques improved during the middle period, surface finishes became smoother, and by the late period, refined technology allowed for a beautifully finished product. Moreover, the calligraphy style of the inscriptions also underwent subtle changes with generational changes in the Goto family. Specialists use differences in surface texture and inscriptions to estimate when individual Keicho Obans were minted. These differences play a crucial role in appraisals, significantly affecting the current evaluation of the Keicho Oban, as can be discerned from the records. Thus, the Keicho Oban has remained an important currency that supported the shogunate's finances, underpinned by its historical background and the evolution of minting technologies. For collectors and experts, its historical significance and technological advancements are key elements that significantly influence its evaluation. ## Auction Trends in the Edo Gold Coin Category Looking at recent auction trends in the Edo gold coin category based on data from a 90-day period ending September 19, 2026, the median auction price was ¥6,967, with 2 transactions. This figure is significantly lower than the previous 90-day period's median of ¥40,000 (5 transactions). However, these numbers are based on fewer than 10 transactions, insufficient for calculating credibility. Consequently, a fluctuation rate cannot be calculated. Examining actual auction cases, a "Rainbow* Collection of Antique Coin Shaped Oban" was auctioned at ¥1,033 on September 17, 2026, and a "J*8 Japanese Edo Antique Silver Kompan" was auctioned at ¥1,300 on September 16, 2026. Many other transactions were recorded, including a "Edo Japanese Antique Silver Kompan" auctioned at ¥1,500 on September 3, 2026, and another at ¥1,100 on July 29, 2026. From this data, it's evident that individual transaction prices within the overall Edo gold coin category vary widely. The small number of transactions influences the median, as deduced from market records. Therefore, auction prices in the entire Edo gold coin category have limitations for judging short-term trends. For detailed price trends, further analysis can be done by referring to the [price trend charts](/market/index) and [auction history](/auctions). Increasing the number of future transactions is necessary to enhance data accuracy. ## Factors Determining the Value of Keicho Oban Gold Coins One crucial element affecting the value of the Keicho Oban gold coin is the "juryo" inscription and seal written at its center. These were handwritten by the Goto family's heads for each piece, serving as the most critical element in authenticity determination. The Goto family monopolized the manufacture and inscription of oban from the Muromachi period to the end of the Edo period, with each generation's handwriting distinctly reflected. Hence, "suminaoshi" pieces where the inscription has faded over time and was rewritten have a significantly lower market value than those with well-preserved original inscriptions. The inscription itself proves authenticity and signifies quality. Furthermore, the Kiwame-in marks placed beside the inscription are also crucial. The types and positions of these Kiwame-in marks are vital clues in the [comprehensive guide to distinguishing fakes and processed pieces](/coinpedia/basics-004-fakes) and served as quality assurance indicators during the oban's manufacturing process. Additionally, understanding the generational characteristics of the Goto family is indispensable for appraising the Keicho Oban. The Kacho inscription by the first head, Mitsunori, involved in the Keicho-Genna period, is characterized by forceful, large strokes with strong pressure, symbolizing the vibrancy and authority right after unification. During the tenure of the second head, Norimasa, in the Kan'ei-Meireki period, the Kacho became slimmer, with more refined end strokes, providing a sophisticated and elegant impression. In the Manji-Genroku period, with the third head, Teijō, active, the script became more delicate and graceful, revealing mastery. Pinpointing these generations requires meticulous comparison with handwriting samples published in specialist books and consulting seasoned experts. Correctly identifying the generation is crucial when applying the [coin grading standards](/guide/grading) and significantly impacts rarity and market price. Thus, understanding the inscriptions, Kiwame-in marks, and the generational characteristics of the Goto family plays a vital role in determining the value of the Keicho Oban gold coin. ## Points to Check When Acquiring and Holding a Keicho Oban When acquiring and holding a Keicho Oban, there are several practical points to confirm. First, in terms of appearance, a comparison with the Tenpo Oban, another representative of the Edo period, is notable. Both weigh approximately 165g and have similar gold fineness, with the Keicho Oban at about 67% and Tenpo Oban at about 67.4%. However, differences in engraving precision, inscription style, and era-specific minting techniques warrant attention. In the market, the rarity and historical background of the Keicho Oban tend to be reflected in its pricing. Particularly, since the Keicho Oban was minted shortly after the establishment of the Edo shogunate, its historical rarity and symbolism are highly valued and commonly traded at different price ranges than the Tenpo Oban. Specifically, exceptionally fine pieces with clear inscriptions can fetch over ¥30 million. Checking auction results by searching [past auction results](/auctions) is recommended for understanding price trends. Furthermore, Keicho Obans with clear provenance tend to receive high market evaluations. Proper maintenance when holding coins should reference [proper coin storage methods](/guide/storage), ensuring storage under conditions avoiding direct sunlight and high humidity. Concerning market trends, the active participation of overseas collectors has become a recent factor in rising auction prices. Based on these trends, it's crucial to verify detailed market records when purchasing. Individual prices and auction cases will be published in market records based on verified documentation. ## The Importance of the Value and Preservation of Keicho Oban Gold Coins ITTENDO's view is that the Keicho Oban gold coin, a symbol of the Edo shogunate's authority and financial power, holds tremendous historical value, with its rarity and material certainty determining its worth. This coin is inherently significant due to its historical background, making it an attractive subject for many collectors and researchers. When evaluating the Keicho Oban gold coin, a strict appraisal process is indispensable. Confirmation of certificates issued by the Japan Numismatic Dealers Association (JNDA) and major auction houses is essential to ensuring reliability. Performing X-ray fluorescence analysis to verify approximately 67% gold fineness is also vital. Most importantly, examining the handwriting of the floral seal by the head of the Goto family is crucial. It's challenging to determine without an experienced expert, thus requiring reliable expert collaboration. Care is paramount for storage, and referencing [proper coin storage methods](/coinpedia/basics-006-hokan) to avoid direct sunlight and high humidity is recommended. Ideally, it should be kept tightly sealed using a dedicated paulownia box or archivally quality hard case, but it is crucial not to perform "suminaoshi" carelessly to prevent fading of the inscription. Maintaining the current condition is most important, along with regular condition checks, ensuring value maintenance. In addition, for transactions involving such historically valuable coins, using the [Vault feature for price monitoring of coins of interest](/vault) enables real-time understanding of price trends. The Keicho Oban gold coin continues to attract great attention due to its historical background and rarity. Thus, proper appraisal and preservation are key to guarding its value.