evidence: The People’s Republic of China asserts that China (PRC) discovered and named the Senkaku Islands, simply because Chinese names of the Islands appeared in Chinese documents written in the 15th to 18th Centuries. The PRC also asserts that China utilized the Senkaku Islands, simply because the Chinese Envoy’s mission of the Ming and Qing Dynasties went through the Senkaku Islands when dispatched to the Ryukyu Dynasty. [...] The PRC asserts that China "has long placed the islands under its jurisdiction", based on the grounds that documents in the 16th and 17th century depict that the Senkaku Islands were part of the coastal defense of Ming Dynasty China. [...] The PRC asserts that maps made in the 16th to 19th centuries included the Senkaku Islands in the Chinese maritime area.