was used in Japan as early as 7000 BCE, during the Jōmon period. Evidence for the earliest lacquerware was discovered at the Kakinoshima "B" Excavation Site in Hokkaido. These objects were discovered in a pit grave dating from the first half of the Initial Jōmon period (approx. 9,000 years ago) Japanese lacquering technology may have been invented by the Jōmon. They learned to refine urushi (poison oak sap) – the process taking several months. Iron oxide (colcothar) and cinnabar (mercury sulfide) were used for producing red lacquer. Lacquer was used both on pottery, and on different types of wooden items. In some cases, burial clothes for the dead were also lacquered. Many lacquered objects have turned up during the Early Jōmon period; this indicates that this was an established part of Jōmon culture. Experts are divided on whether Jōmon lacquer was derived from Chinese techniques, or invented independently. For example, Mark Hudson believes that “Jomon lacquer technology was developed independently in Japan rather than being introduced from China as once believed”. In the Heian period (794-1185), various Maki-e techniques characteristic of Japanese lacquerware were developed. While the method of drawing designs with a brush by dissolving gold powder in lacquer is a common technique in other countries, the method of drawing designs with lacquer and then sprinkling gold, silver, or copper powder of various sizes and shapes on top to polish them was developed in Japan. This made it possible to make the gold and silver of lacquerware brighter than before. In the Kamakura period (1185–1333), carved lacquer from the Song Dynasty of China was imported to Japan. However, many Japanese lacquer craftsmen did not adopt the Chinese method of depositing lacquer and then carving it; instead, they created Kamakurabori, a method of carving wood and then coating lacquer. Japanese lacquerware was abundantly exported to China where the Ming and Qing rulers generally described Japanese lacquerwares as " foreign lacquer " ( yangqi ). Yang Ming, and famous lacquer man Zhejiang, made annotations for A Record of Decoration with Lacquer, ... People of the Ming Dynasty once recorded: “The decoration art with lacquer coated with gold originated (maki-e) from Japan". Yang in the reign of Xuande of the Ming dynasty made a trip to Japan to study Japanese techniques, and a Japanese visited a Chinese imperial workshop in Beijing during the Ming dynasty. It is well documented that the Yongzheng