The Genbun Koban was introduced in 1736 during the Edo period as a gold coin. Its distinctive feature is the "文" inscription in block script, making it easily distinguishable from the Kyōhō Koban and Bunsei Koban.

Characteristics and Historical Background of the Genbun Koban

The Genbun Koban, a gold coin from the Edo period, started minting in the first year of Genbun (1736). Also known as "Bunjikin," it is famous for the "文" inscription in block script imprinted on the reverse side. This script differs from the cursive style used in the later Bunsei Koban, making it easily recognizable.

The obverse maintains traditional Koban designs with the inscriptions "壹两" and "光次" kao (stylized signature). The Genbun Koban possesses a slightly reddish hue, differing from the deep golden color of the Kyōhō Koban.

According to the Permanent Exhibition Catalog of the Currency Museum of the Bank of Japan, the Genbun Koban's gold fineness is 66%, and its weight is 13g. These figures reflect the standard fineness and manufacturing methods of the time. Notably, the fineness was not publicly disclosed by the shogunate, so the public could not accurately know it.

Such changes in manufacturing techniques and fineness are crucial elements in understanding the monetary system of the Edo period.

For more details, see Genbun Koban.

Issuance Background and Positioning of the Genbun Koban

The Genbun Koban, issued in 1736, had a lower gold fineness compared to the Kyōhō Koban, indicating a higher silver ratio. This change gave the Genbun Koban a distinctive reddish tone different from the Kyōhō Koban.

The tonal differences between the Genbun and Kyōhō Kobans are noticeable even to the trained eye, providing valuable insights into the evolving monetary policies of the Edo period. The adjustment of gold fineness during its minting signified significant changes in the coin's properties.

For information on its relationship with the Kyōhō Koban, refer to Kyōhō Koban. Moreover, the Bunsei Koban features a different script style of the "文" inscription, distinguishable from the Genbun Koban's block script. The differences between the Genbun's block script and the Bunsei's cursive script can be verified in Bunsei Koban.

The issuance background of the Genbun Koban holds significant importance within the context of Edo-period monetary policies, with changes in fineness and hue reflecting economic conditions and policy shifts of the time.

Confirmed Specifications and Sources of the Genbun Koban

The Genbun Koban began minting in 1736 (source: Permanent Exhibition Catalog of the Currency Museum of the Bank of Japan). It is reported to have a gold fineness of 66% and a weight of 13g (source: Permanent Exhibition Catalog of the Currency Museum of the Bank of Japan). These values are approximate.

However, according to the Meiji period Dajōkan Proclamation range, it is listed as 653.2‰ or 65.32%. These are based on different series, and no uniform "correct value" exists (source: Issues and Non-destructive Analysis Results on Edo-Period Koban Fineness).

Additionally, a non-destructive analysis of specimens held by the Currency Museum of the Bank of Japan showed gold fineness ranging from 65.2 to 66.0% and a weight of 13.05g (source: Issues and Non-destructive Analysis Results on Edo-Period Koban Fineness).

Furthermore, since the shogunate did not disclose the fineness of the Koban, the public could not know the precise fineness (source: Issues and Non-destructive Analysis Results on Edo-Period Koban Fineness).

For more information on the Genbun Koban, please visit Genbun Koban.

Relationship Between the Genbun Koban and Related Coin Types

The Genbun Koban was a major currency during the Edo period, with important relations to other Kobans. Its features stand out especially when compared to the Kyōhō Koban and the Bunsei Koban.

The Kyōhō Koban, circulated before the Genbun Koban, is linked to forgery issues. Due to its high gold fineness, attempts at forgery were made. Accurate measurements reveal differences in weight and dimensions between the Kyōhō and Genbun Kobans, as detailed in Kyōhō Koban.

The relationship with the Bunsei Koban is also intriguing. There exist forgeries of the Bunsei Koban with an added block script "文" of the Genbun Koban. This forging occurred after the Bunsei Koban was issued and may reflect on its circulation and market status. The relationship with Bunsei Koban should be examined.

Compared to other coins, the Genbun Koban had a substantial circulation and maintained presence in the collectors' market. When trading, the clarity of the reverse-side inscription is emphasized. When collecting the Genbun Koban, attention to related coins and forgeries is crucial for proper assessment.

Preservation of the Genbun Koban and Ittendo's Perspective

When preserving a Genbun Koban, it is vital to store it in a suitable environment and conduct regular maintenance. Despite its stability as a gold coin, it should be kept away from direct sunlight and stored under stable temperature and humidity conditions to prevent environmental degradation. Using special coin capsules or slab cases can protect the Koban from physical damage and airborne pollutants. When handling, gloves should be worn to avoid direct contact. Consulting experts for cleaning is advisable. For detailed storage methods, refer to Proper Coin Storage Methods.

The Genbun Koban combines the beauty and history of Edo-period gold coins, serving as a "gateway to Koban collecting" for enthusiasts. Its true value lies in its stability and historical significance. For advanced collectors, it is a starting point for comparative studies with other Edo gold coins, deepening understanding of Edo-period monetary economics. Market records have not yet confirmed specific auction records for the Genbun Koban, but market trends can be tracked through Auction History.

For further information on the Genbun Koban, visit Genbun Koban.