Tanaka Shōsuke (田中 勝助, also 田中 勝介) was an important Japanese technician and trader in metals from Kyoto during the beginning of the 17th century.
According to Japanese archives (駿府記) he was a representative of the great Osaka merchant Gotō Shōsaburō (後藤 少三郎). He is the first recorded Japanese to have travelled to the Americas in 1610 (although some Japanese, such as Christopher and Cosmas, are known to have sailed across the Pacific on Spanish galleons as early as 1587). Returning to Japan in 1611, he again went to North America in 1613, with the embassy of Hasekura Tsunenaga. In total, he accomplished two roundtrips between Japan and North America and helped establish trade and diplomatic relations between Japan and the Spanish Empire.
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Before the travels of Tanaka Shosuke, Japan had few contacts with the Spanish, and had instead relied upon the Portuguese, the Chinese, and to a much lesser extent the Dutch and the English for her foreign trade during the first part of the "Nanban trade period".
Japan had also been very active sailing Red seal ships throughout Asia, original Japanese ships that were broadly similar to Chinese junks, but incorporating various Western techniques and designs (such as square and lateen sails), but had never ventured as far as the American continent.
The shogun Tokugawa Ieyasu was eager to develop trade with foreign nations, and was particularly looking forward to an opportunity to develop trade with the Spanish Empire. He had already asked William Adams to exchange trade proposals with the Philippines in 1608, without great success. An opening finally came when the former interim governor of the Philippines Rodrigo de Vivero y Velasco was shipwrecked on the coast of Japan in 1609. Rodrigo de Vivero y Velasco remained in Japan for 9 months, and took the opportunity to negotiate the first treaty of exchanges between Japan and New Spain, involving offering extraterritorial privileges for a Spanish shipyard and a Naval base in the eastern Japan in exchange for transpacific trade and Mexican silver mining technology.
On August 1610 Tanaka Shosuke was ordered by the retired Shogun Tokugawa Ieyasu to accompany Rodrigo de Vivero y Velasco back to New Spain (Nueva España), together with 22 other Japanese representatives, onboard the San Buena Ventura, a 120 ton ship built in Japan under the supervision of William Adams a few years earlier. Also among them was Father Muños, a Franciscan Father, sent by Tokugawa Ieyasu as a representative to negotiate the establishment of trade between Japan and Nueva España.
Following their arrival in New Spain in November 1610, Luis de Velasco, the viceroy of New Spain received the 23 Japanese and expressed his great satisfaction at the treatment the Spanish sailors had received in Japan. He decided to send an embassy to Japan in the person of the famous explorer Sebastian Vizcaino. The viceroy confiscated the San Buena Ventura however, fearful that the Japanese would manage to master the art of trans-oceanic navigation.[1]
Spanish sources indicate that Tanaka Shosuke studied silver mining techniques in Mexico before returning to Japan, obtaining knowledge which would have been very useful to Japan as it relied on silver (and copper) for the payment of her imports (see also Red seal ships). Tanaka Shosuke is also reported as having brought back mulberry wood from the New World, which he offered to Tokugawa Ieyasu, who used it to build a bath in his Palace.[2]
A contemporary journal, written by the historian Chimalpahin Quauhtlehuanitzin, a noble Aztec born in Amecameca (ancient Chalco province) in 1579, whose formal name was Domingo Francisco de San Anton Muñon, gives some account of the visit of Tanaka. He explains that Tanaka, retailer and merchant, was considered and treated as an ambassador for the commercial exchanges between Japan and New Spain.
He also says that they were allowed to walk with their sword at the side, something not usually permitted to traders, and that they were in formal Japanese attire:
Several of the Japanese (at least three according to Chimalpahin's account) chose to baptized in Mexico, starting with the head of the delegation,[3] who took the Christian name of Don Alonso:
Tanaka Shosuke was also baptized, and took the Christian name of "Don Francisco de Velasco Josuke".
According to the account, three Japanese from the mission of Tanaka chose to remain in Mexico. He relates the departure of the group:
Tanaka Shosuke returned to Japan in 1611 with Sebastian Vizcaino. Vizcaino had a mission to return 4,000 ducados that Tokugawa Ieyasu had lent to the previous mission, and to research "gold and silver islands", supposedly to the east of Japan. They left for Japan on 22 March 1611, and arrived in the harbour of Uraga.
Tanaka Shosuke helped prepare the first official Japanese embassy to the Americas and Europe, by meeting extensively with Hasekura Tsunenaga, who was in charge of the project.
He is recorded as again having left for the Americas in 1613 onboard Hasekura's Japanese-built 500 ton galleon San Juan Bautista with the embassy and a total of 140 Japanese. Sebastian Vizcaino, whose own ship had been disabled in a storm near Japan, was also on the San Juan Bautista to return to Mexico.
Some of the Japanese traders who had been left behind in Mexico by Tanaka four years before took the opportunity of the return trip of the San Juan Bautista in October 1614 to return to Japan:
It is unknown whether Tanaka Shosuke continued with Hasekura to Europe, or stayed in Mexico waiting for the return of Hasekura, or returned to Japan in October 1614.