1 Bu Japan Gold

1 Bu
Issue year(s):

Catalog reference:

1721-1724, Japan, Koshu Province. Gold Shin Koshu Ichi Bu Kin Coin

Mint Period: 1721-1724

Region: Koshu (Kai) Province, Japan
Denomination: Shin Koshu Ichibu-kin (1 Bu)
References: Friedberg 40, JNDA 9-87, KM-94.

Diameter: 16mm

Weight: 3.71gm

Material: Gold!

Obverse: Paulownia flower and three Hanji characters.

Reverse: Two Hanji characters.

Koshu-kin (Koshu Gold) was Japan’s first systematic gold coinage to be minted. Cast until the Edo Period Bunsei era (1804-1829) the coins were originally circulated through Takeda Shingen’s province of Kai (Yamanashi).
Around the edge of the coins were small raised dots, giving the impression of the nail studs holding the stretched skins across a Taiko drum, and for this reason, they were also known as taikoban. These were difficult to forge, and hence coined the phrase (pun intended!) “Taiko-ban o-su”, meaning “undeniably”, or “Without a doubt”. Modern day 500 Yen coins feature the same denticles around the outer rim.
Although the actual origin of the Koshu Gold is unknown, it is believed the coins were minted by four families using gold taken from Kai provinces deep mines.

Kai Province (甲斐国Kai-no-kuni) was a province of Japan in the area of Japan that is today Yamanashi Prefecture. Kai bordered on Sagami, Suruga, Shinano and Musashi Provinces. Its abbreviated form name was Kōshū (甲州). The origin of its name is uncertain. It lies in central Honshū, west of Tokyo, in a landlocked mountainous region that includes Mount Fuji along its border with modern Shizuoka Prefecture.

Kai was one of the original provinces of Japan established in the Nara period under the Taihō Code. The original capital of the province was located in what is now Fuefuki. Under the Engishiki classification system, Kai was ranked as a “superior country” (上国) in terms of importance, and one of the 16 “middle countries” (中国) in terms of distance from the capital. Although not directly on the Tōkaidō, it was also included as one of the Tōkaidō provinces.

Numerous remains from the Kofun period have been found in Kai. During the Heian period, the area came under the control of the Kai Genji, who controlled the province throughout the Kamakura period. During the Sengoku period, a branch of the clan, the Takeda clan rose to prominence. The warlord Takeda Shingen, ruled Kai from his stronghold at Kōfu and expanded the holdings of the clan to include Shinano and Suruga Provinces, and engaged in constant warfare against the Uesugi clan in Echigo Province. After the Takeda were defeated by a coalition led by Oda Nobunaga and Tokugawa Ieyasu, Kai Province came briefly under the rule of Nobunaga’s retainer Kawajiri Hidetaka. After Nobunaga’s assassination, the province was contested between Tokugawa Ieyasu and the Go-Hōjō clan based in Odawara. However, after the destruction of the Go-Hōjō by Toyotomi Hideyoshi in 1590, the province was ruled by a succession of Toyotomi loyalists.

With the establishment of the Tokugawa shogunate, Kai was regarded as strategically important to the defense of Edo due to its position between the Tōkaidō and Nakasendō highways, which were connected through Kai Province by the Kōshū Kaidō. Kai Province was entrusted briefly to Tokugawa clan members or the highly trusted Yanagisawa clan from 1705-1724 as Kōfu Domain, but for the most part was retained as tenryō territory ruled directly by the shogunate through a succession of hatamoto-class daikan.

After the Meiji Restoration, Kai province was renamed Kōfu Prefecture in 1869. With the abolition of the han system in 1871, it was renamed Yamanashi Prefecture.


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2  coins in the group

(3203 X 1547pixels, file size: ~832K)
Posted by: anonymous  2023-10-30
1721-1724, Japan, Koshu Province. Gold Shin Koshu Ichi Bu Kin Coin. PCGS XF-45! Mint Period: 1721-1724 Region: Koshu (Kai) Province, JapanDenomination: Shin Koshu Ichibu-kin (1 Bu)References: Friedberg 40, JNDA 9-87, KM-94. Condition: Certified and graded by PCGS as XF-45! Diamete ...

(740 X 368pixels, file size: ~69K)
Posted by: anonymous  2019-06-13
1850,JAPAN. Kosyu. 1 Bu-Kin o. J. (um 1850). 3.72 g. Fr. 40. Selten / Rare. Gutes sehr schön / Good very fine. (~€ 440/USD 505)

Sold for: $36.0
Info: https://www.ebay.com/itm/404956533075 2024-05-23
1992 U.S. $1 Dollar American Silver Eagle 1 Oz .999 Lot#A4927 High Grade!

Sold for: $36.0
Info: https://www.ebay.com/itm/404955182027 2024-05-23
1901-S U.S. $1 Morgan Dollar Lot#A4883 Large Silver Coin!

Sold for: $168.0
Info: https://www.ebay.com/itm/404955180626 2024-05-23
1903 U.S. $1 Morgan Dollar Lot#A4882 Large Silver Coin!
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