The Background of the Creation of Bunsei Nishugin: Bunsei Reforms and the Structuring of the Silver Coin System
Bunsei Nishugin is a silver two-shu coin minted in Bunsei 11 (1828) during the reign of the 11th Shogun, Tokugawa Ienari. The Bunsei era (1818–1830) was a period when relatively stable economic conditions were maintained in the late Edo period, and the Bunsei Nishugin minted during this time is positioned as an important auxiliary coin complementing the bakufu's silver coin system. The two-shu unit is equivalent to one-eighth of a ryo (one-half of a bu), which is larger than one-shu (one-sixteenth of a ryo) and smaller than one-bu (one-fourth of a ryo), making it an intermediate denomination. The demand for this two-shu unit was high in daily commercial transactions, and Bunsei Nishugin played a role in meeting that demand. During the same period, Bunsei Koban circulated as the main gold coin, and Bunsei Nishugin functioned as a silver coin in conjunction with this. To understand the overall currency policy of the Bunsei era, it is important to have an overview of the relationship between gold and silver coins of the time. Check Introduction to Edo Silver Coins (Chogin, Mameitagin, Ichi-bu-gin) for the overall silver coin system.
The Basic Specifications and Visual Characteristics of Bunsei Nishugin
Bunsei Nishugin has a rectangular (oblong) shape measuring approximately 33mm vertically and 16mm horizontally. The weight is about 3.42g, with a silver fineness of about 98%, an extremely high standard. This size and high purity are major features of Bunsei Nishugin, clearly distinguishing it from later Nishugin with decreased purity. The front is inscribed with "二朱銀" and the back bears the silver mint's verification mark (gokuin). This mark is a guarantee of quality and is an important point in authenticity verification. Checking the shape of the gokuin, the precision of the stamping, and the depth of character engraving is fundamental to appraisal. The high silver purity (98%) is also visually confirmable. Genuine Bunsei Nishugin has a bright white silver luster, and properly stored specimens can maintain this beautiful luster for centuries. Conversely, poorly stored specimens may exhibit discoloration (tarnishing) due to surface oxidation. This discoloration serves as an indicator of storage conditions and directly affects market price. Compare with similar silver coins in Complete Explanation of Nishugin (including Nanryo Nishugin).
The Transition of the Nishugin Series: Deterioration in Quality from Bunsei to Kaei
Nishugin was issued in several periods from late Edo to the end of the Bakumatsu, and the quality of each era directly reflects the shogunate's financial situation. Key points of comparison among notable Nishugin: Kyōhō/Meiwa period Nanryo Nishugin (1767–): About 98% silver purity, 3.6g weight. Praised for its high quality as "Nanryo (superior silver)." Bunsei Nishugin (1828–): Maintained the same high standard of silver purity at about 98%, weighing about 3.42g. Kept up the quality level of Nanryo Nishugin as a high-quality silver coin. Tenpō Nishugin (1832–): Maintained 98% silver purity. Still a high-quality period before the financial difficulties of Bakumatsu became evident. However, entering Bakumatsu, the purity rapidly decreased. The silver purity dramatically declined in Nishugin issued after Ansei and Man'en, marking a clear distinction from high-grade Bunsei Nishugin. The era of "high purity Nishugin" to which Bunsei Nishugin belongs symbolizes the "stable period of late Edo" when the shogunate still had some financial leeway. By contrasting this with Detailed Explanation of Nanryo Nishugin, the transition history of Nishugin's quality can be systematically understood.
Bunsei Nishugin and Bunsei Koban: The Relationship of Gold and Silver Coins of the Same Period
In the Bunsei era when Bunsei Nishugin was issued, Bunsei Koban also circulated as the main koban of the time. These two coins assumed mutually complementary roles within their respective silver and gold coin systems. The currency policy of the Bunsei era can be understood as part of the 11th Shogun Tokugawa Ienari's "Bunsei Reforms." This period, preceding the Tenpō reforms (of the 12th Shogun Tokugawa Ieyoshi), experienced relatively stable political and economic conditions, and there was still financial leeway to maintain high-quality coins. The high silver purity (about 98%) of Bunsei Nishugin is a product reflecting this period of stability. As time progressed from Bunsei to Tenpō and into Bakumatsu, increasing financial difficulties led to a decline in coin purity. Possessing Bunsei Nishugin means holding a witness to the "last period when the Edo shogunate could issue stable quality coins." By comparing with the Tenpō Koban, one can learn about changes in currency policy before and after the Tenpō Reforms through tangible artifacts.
Points and Precautions for Authenticity Verification
For authenticity verification of Bunsei Nishugin, first confirm the weight (about 3.42g) and dimensions (approximately 33mm vertically × 16mm horizontally). Perform measurements using a precision scale (0.01g intervals) and a caliper to ensure there is no significant deviation from these standard values. This initial screening prevents confusion with counterfeits or Nishugin of different eras. The most crucial verification point is the silver mint's gokuin on the reverse. Genuine Bunsei Nishugin's gokuin is uniformly and clearly stamped, with the metal flow being natural. In counterfeits, the gokuin outline may be unclear, or the depth of stamping uneven. Detailed observation with a magnifying glass is essential. The risk of counterfeit Bunsei Nishugin is relatively low, but caution is needed regarding "Qing dynasty-era Chinese fakes." In China from the late 19th to early 20th century, a few imitations of Japanese Edo-period silver coins were produced, some resembling genuine ones in purity and appearance. When purchasing, it is crucial to obtain from a trusted antique dealer and select specimens of known provenance. Check Guide to Identifying Fakes and Altered Coins for detailed authentication methods.
Evaluation and Price Range in the Collectors' Market
The price range of Bunsei Nishugin in the collectors' market is distinctly divided by storage condition. The price range of Bunsei Nishugin is on a similar level with comparable Nanryo Nishugin. Both share high silver purity and similar demand as representative high-quality silver coins of late Edo. By collecting both, you can confirm the subtle design and quality differences due to era changes. As an investment evaluation of Bunsei Nishugin, it has an excellent balance of "stable demand" and "moderate availability." It is neither too rare nor too difficult to obtain generally, making it an enriching piece for introductory to intermediate Edo silver coin collections. Proper storage following Complete Guide to Old Coin Storage and Preservation can maintain its value over the long term. Individual prices are listed only once verifiably matched, sourced records exist.
Position of Bunsei Nishugin in the Edo Silver Coin Collection
In collecting Edo silver coins, Bunsei Nishugin is an important piece in a "systematic collection." Within the entire spectrum of Edo silver coins, Bunsei Nishugin stands as a representative of the "late Edo high-quality silver coin group." Acquiring this era's high-quality silver coin group (Nanryo Nishugin, Bunsei Nishugin, etc.) forms a collection that exemplifies the "stability period" of Edo coin quality. "The transition of Nishugin over time" is the most popular systematic collection theme. The sequence from Kyōhō/Meiwa period Nanryo Nishugin (high-quality, pioneering) → Bunsei Nishugin (high-quality, stable period) → Tenpō and later Nishugin (maintenance period) → end of Bakumatsu low-quality Nishugin (deterioration period) allows one to experience Edo financial history three-dimensionally. Additionally, combining it with contemporary gold coins ( Bunsei Koban ) creates a "Bunsei Era Gold and Silver Set," popular among collectors. Lining up gold and silver coins of the same era enables recreating the monetary world that people of the time interacted with in their daily lives. A systematic approach based on Factors Determining the Value of Old Coins leads to the maximization of the long-term collection value.