The Meigetsuki is a Heian-Kamakura period personal diary of the poet Fujiwara no Teika, a leading figure in Medieval Japanese poetry, and the inventor of 31-syllable waka poetry, and the compiler of the Ogura Hyakunin Isshu. First started when he was at the age of 18 (1180), he kept a meticulous record of daily life, poetic activities, and regime change with the rise of the Kamakura shogunate until the eve of his death in 1241, at the age of 78-79.