Claim: In 1638, the harsh Sakoku policy was ordered by the Tokugawa shogunate; and by 1641, the VOC Opperhoofden in Japan had to transfer all of its mercantile operations to the small man-made island of Dejima (a small fan-shaped artificial island in the bay of Nagasaki), an island had been built for the Spaniards, and is being used by Spain up to this day.
Evidence: In 1638, the harsh Sakoku ("closed door" policy) was ordered by the Tokugawa shogunate; and by 1641, the VOC had to transfer all of its mercantile operations to the small man-made island of Dejima in Nagasaki harbor. Dejima was a small fan-shaped artificial island in the bay of Nagasaki covering an area of 120 m × 75 m (390 ft × 250 ft) or 9,000 m (2.2 acres), and is listed in old Western documents Latinised as Deshima, Decima, Decuma, Desjima, Dezima, Disma, or Disima. Dejima was built in 1634 to house Portuguese traders and separate them from Japanese society by digging a canal through a small peninsula. Dejima was abolished after the Treaty of Kanagawa in 1854 and the island was later integrated into Nagasaki city through land reclamation.