Yamada Nagamasa Yamada Nagamasa was born in Numazu , Shizuoka in 1590 . He is said to have been a palanquin bearer of the lord of Numazu . He became involved in Japanese trade activities with Southeast Asia during the period of the Red seal ships and settled in the Ayutthaya Kingdom ( modern - day Thailand ) around 1612 . Japanese settlement in southeast Asia . From 1617 until his death in 1630 , Yamada Nagamasa was head of the Japanese village referred to as " Ban Yipun " in the Thai language . This village was situated within the city of Ayutthaya ( the capital city of the Ayutthaya Kingdom ) . " Ban Yipun " was home to roughly 1 , 000 Japanese citizens , and was headed by a Japanese chief who was nominated by Ayutthayan authorities . Its inhabitants of were a combination of traders , Christian converts who had fled their home country following the persecutions of Toyotomi Hideyoshi and Tokugawa Ieyasu , and Rōnin ( unemployed former samurai ) who had been on the losing side at the battle of Sekigahara ( 1600 ) or the Siege of Osaka ( 1614 – 15 ) : The Christian community seems to have been in the hundreds , as described by Padre António Francisco Cardim , who recounted having administered sacrament to around 400 Japanese Christians in 1627 in the city of Ayutthaya . The " Ban Yipun " colony was active in trade , particularly in the export of deer - hide to Japan in exchange for Japanese silver and handicrafts ( swords , lacquered boxes , high - quality papers ) . The Japanese were noted by the Dutch for challenging the trade monopoly of the Dutch East India Company ( " Vereenigde Oost - Indische Compagnie " ) . The colony also had an important military role in the Ayutthaya Kingdom . Yamada Nagamasa is alleged to have carried on the business of a privateer from the period of 1620 , attacking and plundering Dutch ships in and around Batavia ( present day Jakarta ) . Stories of Yamada burying his treasure on the east coast of Australia ( and in particular , Magnetic Island off Townsville ) persist but it is highly unlikely that Yamada would have ventured into that area as there were no trade routes in this region and the only ships to venture to this region were the ones blown off course during the summer storms . Furthermore , Yamada would have passed thousands of islands in the Torres Strait and Coral Sea and these would have provided safe keeping for any treasure and avoided a very long recovery voyage in the future . Military involvement and lordship . The Japanese colony was highly valued for its military expertise , and was organized under a " Department of Japanese Volunteers " ( " Krom Asa Yipun " ) by the king of Ayutthaya . In the space of fifteen years , Yamada Nagamasa rose from the low Thai nobility rank of " Khun " to the senior of " Ok - ya " , his title becoming " Ok - ya Senaphimuk ( Thai : ออกญาเสนาภิมุข ) " . He became the head of the Japanese colony , and in this position supported the military campaigns of the King Songtham , at the head of a Japanese army flying the Japanese flag . He fought successfully , and was finally nominated Lord of The World ( modern Nakhon Si Thammarat ) , in the southern peninsula in 1630 , accompanied by 300 samurai . Travels between Siam and Japan . After more than twelve years in Siam , Yamada Nagamasa went to Japan in 1624 onboard one of his ships , where he sold a cargo of Siamese deer hide in Nagasaki . He stayed in Japan for three years , trying to obtain a Red Seal permit , but finally left in 1627 , with the simple status of a foreign ship . In 1626 , Nagamasa offered a painting of one of his fighting ships to a temple of his hometown in Shizuoka . That painting was lost in a fire , but a copy of it remains to this day . It portrays a ship with Western - style rigging , 18 cannons , and sailors in samurai gear . He returned to Siam in 1627 . In 1628 , one of his ships transporting rice from Ayutthaya to Malacca was arrested by a Dutch warship blockading the city . The ship was released once the identity of the owner became clear , since the Dutch knew that Yamada was held in great respect by the King of Siam , and they did not wish to enter into a diplomatic conflict . Yamada was also valued by the Dutch as a supplier of deer hide , and they invited him to trade more with Batavia ( Accounts of the castle of Batavia , March 1 , 1628 ) . In 1629 , Yamada Nagamasa visited Japan with a delegation from King Songtham . He soon travelled back to Siam , but became involved in a succession war following the death of the King Songtham . He was wounded in combat in 1630 , and then apparently poisoned through his wound , which led to his death . End of relations between Siam and Japan . Following Yamada ' s death in 1630 , the new ruler and usurper king of Siam Prasat Thong ( 1630 – 1655 ) sent an army of 4000 soldiers to destroy the Japanese settlement in Ayutthaya , but many Japanese managed to flee to the Khmer Kingdom . A few years later in 1633 , returnees from Indochina were able to re - establish the Japanese settlement in Ayutthaya ( 300 - 400 Japanese ) . From 1634 , the shōgun , informed of these troubles and what he perceived as attacks on his authority , refused to issue further Red Seal ship permits for Siam . Desirous to renew trade however , the king of Siam sent a trading ship and an embassy to Japan in 1636 , but the embassies were rejected by the Shogun , thus putting an end to direct relations between Japan and Siam . Japan was concomitantly closing itself to the world at that time , a period known as Sakoku . The Dutch took over the lucrative Siam - Japan trade from that time on . Nagamasa now rests in his hometown in the area of Otani . The remnants of the Japanese quarters in Ayutthuya are still visible to visitors , as well as a statue of Yamada in Siamese military uniform .