Iki no Hakatoko
Iki no Hakatoko (伊吉 博德; seventh century) was a Japanese diplomat, legal scholar and writer. It is said that his diary, Iki no Hakatoko no Fumi (伊吉連博徳書, "Iki no Hakatoko's Writings"), a record of his mission to Tang China, is the oldest example of a diary in Japan. None of the original text has been preserved but extracts are quotes in the Nihon Shoki.