At its maximum extent, the Dutch trading center covered the whole area of present-day Sakikata Park. In 1637 and in 1639, stone warehouses were constructed, and the Dutch builders incorporated these dates into the stonework. However, the Tokugawa shogunate disapproved of the use of any Christian year dates, and therefore demanded the immediate destruction of these two structures. This failure to comply with strict "sakoku" practices was then used as one of the Shogunate's rationales for forcing the Dutch traders to abandon Hirado for the more constricting confines of Dejima, a small artificial island in the present-day city of Nagasaki. The last VOC "Opperhoofd" or "Kapitan" at Hirado and the first one at Dejima was François Caron, who oversaw the transfer in 1641. However, modern research indicated that this incident might actually have been an excuse for the Shogunate to take the Dutch trade away from the Hirado clan. The stone warehouse from 1639 that was torn down was reconstructed back to its original form in 2011.