century AD have also been found in Yayoi period archaeological sites. However, the Japanese people of that era probably had little to no comprehension of the script, and they would remain relatively illiterate until the fifth century AD, when writing in Japan became more widespread. According to the Nihon Shoki and Kojiki, a semi-legendary scholar called Wani was dispatched to Japan by the Kingdom of Baekje during the reign of Emperor Ōjin in the early fifth century, bringing with him knowledge of Confucianism and Chinese characters. The earliest Japanese documents were probably written by bilingual Chinese or Korean officials employed at the Yamato court. For example, the diplomatic correspondence from King Bu of Wa to Emperor Shun of Liu Song in 478 AD has been praised for its skillful use of allusion. Later, groups of people called fuhito were organized under the monarch to read and write Classical Chinese. During the reign of Empress Suiko (593–628), the Yamato court began sending full-scale diplomatic missions to China, which resulted in a large increase in Chinese literacy at the Japanese court. In ancient times, paper was so rare that people wrote kanji onto thin, rectangular strips of wood, called mokkan (). These wooden boards were used for communication between government offices, tags for goods transported between various countries, and the practice of writing. The oldest written kanji in Japan discovered so far were written in ink on wood as a wooden strip dated to the 7th century, a record of trading for cloth and salt. The Japanese language had no written form at the time Chinese characters were introduced, and texts were written and read only in Chinese. Later, during the Heian period (794–1185), a system known as kanbun emerged, which involved using Chinese text with diacritical marks to allow Japanese speakers to read Chinese sentences and restructure them into Japanese on the fly, by changing word order and adding particles and verb endings, in accordance with the rules of Japanese grammar. This was essentially a kind of codified sight translation. Chinese characters also came to be used to write texts in the vernacular Japanese language, resulting in the modern kana syllabaries. Around 650 AD, a writing system called man'yōgana (used in the ancient poetry anthology Man'yōshū) evolved that used a number of Chinese characters for their sound, rather than for their meaning. Man'yōgana written in cursive style evolved into hiragana (literally