Tensho Hishi Ōban — The Ambition of Toyotomi Hideyoshi Reflected in Gold

In the 19th year of Tensho (1591), Toyotomi Hideyoshi was in the process of unifying Japan. His governance extended beyond mere military power to economic policies. Hideyoshi believed that establishing a stable monetary system was key to long-term peace. This is against the backdrop of the 1588 sword hunt decree, which confiscated weapons from peasants, and the conquest of Odawara in 1590, which brought Kantō under control. These policies successfully brought daimyo across the nation under control. However, to maintain their loyalty, something special was needed as gifts for them. The coins became the focal point. The Tensho Ōban minted by the Gotō family was an excellent choice for gifts. In particular, the Tensho Hishi Ōban carried a special meaning among them. Alongside the Hashime Ōban, this Ōban reflected Hideyoshi’s political intent, showing how he ranked and maintained influence over the daimyo across various regions. The minting of the Tensho Hishi Ōban was more than just for gifts; it vividly illustrated the political and economic situation of the time. By also referencing the Types and Identification of Edo Gold Coins, a deeper understanding of Hideyoshi's era can be achieved.

The production of the Tensho Hishi Ōban was handled by the Gotō family, who managed the Kinza (gold mint). The Gotō family was a prestigious lineage that monopolized Japanese coin production from the Sengoku to the Edo period, continuing the tradition from the first Gotō Shōzaburō Mitsutsugu. Their technology was highly advanced, requiring meticulous techniques to maintain the purity of the gold and unique design skills. Particularly, gold refining required advanced chemical knowledge and experience, setting the Gotō family above the rest. The Tensho Hishi Ōban is characterized by a rhombus pattern engraved on its reverse side, distinguishing it from the Hashime Ōban. This rhombus pattern is said to emulate Hideyoshi’s family crest, the Paulownia crest, symbolizing his authority. The design is also said to symbolize Hideyoshi's accomplishment of national unification. Minting took place at the Kinza in Kyoto, utilizing the most advanced technologies of the time. The coin weighed about 165g, with gold purity around 73%, which was high compared to other contemporary gold coins. To produce such high-quality currency, the Gotō family's exceptional craftsmanship and Hideyoshi's absolute trust were indispensable. The Gotō family, heavily relied upon by Hideyoshi, manufactured various coins by his command. The production process of the Tensho Hishi Ōban extended beyond mere coin minting, carrying a political message as an art piece. Even compared to the Details of Keichō Koban, the Gotō family's high technical skill is evident. Due to its limited issuance, extant Tensho Hishi Ōban are extremely rare and hold high historical value. As such, the Gotō family's renown was further elevated, establishing an unshakeable position in Japanese coinage history.

The Tensho Hishi Ōban did not circulate widely due to its rarity but played a vital role as a gift among upper-class individuals like daimyo. Its use as a gift was part of Toyotomi Hideyoshi's strategy to maintain influence over daimyo across the nation, securing their loyalty. For example, in the 20th year of Tensho (1592), during the Korean invasion, it is said that Hideyoshi distributed Tensho Ōban to daimyo participating, such as Ishida Mitsunari and Katō Kiyomasa, to boost their morale. Thus, the Tensho Hishi Ōban also functioned as a tool for political maneuvering. At the time's prices, the value of the Tensho Hishi Ōban was extremely high, and it was difficult for ordinary citizens to obtain it. Even in the market, transactions using it were limited due to its high cost, preventing it from entering general circulation. The Tensho Hishi Ōban was truly a coin for the privileged class and held a special position in economic activities. Minted by the Gotō family, this Ōban weighed about 165g, had gold purity around 73%, and was nearly equivalent to the Hashime Ōban, but was distinguished by a rhombus (◇) stamp on the reverse side. The remaining Tensho Hishi Ōban are very few, and its issuance history continues to be debated among experts. This economic background is believed to have also influenced later Details of Edo Silver Coins.

The Tensho Hishi Ōban influenced subsequent monetary systems, significantly impacting the value perception of currency in the Edo period. Around the 19th year of Tensho (1591), minting began by Gotō Shōzaburō Mitsutsugu with its notable rhombus (◇) mark on the reverse. It was distinguished from the Hashime Ōban and had a specification of weighing about 165g and gold purity around 73%. These Ōban gold coins were primarily created for gifts and rewards, and are said to have been used to signify the ranking among daimyo. They are less numerous than the Hashime Ōban, and the details of their issuance continue to be debated among specialists.

Entering the Edo period, coin minting technology and distribution systems further developed, leading to the birth of many coins such as the Keichō Koban. These coins took inspiration from large gold coins like the Tensho Hishi Ōban and served as important references for later coin production. For instance, when the Edo Shogunate was established, the Shogunate sought to unify the currency and issued Keichō Koban during the Keichō era, where the techniques and designs of the Tensho Hishi Ōban are believed to have been referenced. Up to the Tenpō era, coin designs and purity continued to be influenced by coins like the Tensho Hishi Ōban. In modern times, the Tensho Hishi Ōban is highly esteemed among antique coin collectors, frequently trading at high prices owing to its rarity and historical background. Moreover, those in excellent condition become notable targets in international auctions. For instance, in a 2020 international auction, a particularly well-preserved Tensho Hishi Ōban fetched several tens of millions of yen, capturing attention. As a collector's item, the Tensho Hishi Ōban transcends a mere coin, serving as an important witness telling the story of history. Understanding such backgrounds is useful through learning Basic Knowledge of Antique Coin Auctions.