In 5th year of Bunsei (1822), death of a girl who barely became 5 was a topic of conversations in Edo. Her name was Tsuyu. She borned as a daughter of Ikeda Sadatsune, former lord of sub-domain of Inaba-Tottori domain, and called himself "Kanzan" as a penname after retirement. On November 27 of the same year, Tsuyu ended her short life stricken by smallpox. Her posthumous Buddhist name was Jokan'in Gyokuro Joho Dojo. One reason why her death was made a topic was that 1600 propose and poetry items and Japanese poem "waka" were delivered to Ikeda Kanzan, Tsuyu's father, who was also a man of culture of first class at that time, by his friends and acquaintances, feudal lords and scholars, mourning her death. Moreover, letters that looked like her wills, Japanese poem "waka" and stanzas found after her death were block-printed by her father in faithful reproduction of her products and were distributed to many people. Condolences over untimely death of Tsuyu and over her premature talents increased. "Mikikigusa" contains these wood-block prints, allowing readers to see good handwriting of Tsuyu.
Tsuyu's letter addressed to father Kanzan reads, "Dearest father, this is Tsuyu's wish, but please don't let your health spoiled by drinking sake too much." Tsuyu made her last request to her father not to drink sake too much to weaken his health. Tsuyu called herself "Matsudaira Tsuyu" because Ikeda Family was allowed to use surname "Matsudaira." Ikeda Kanzan also sometimes called himself "Matsudaira Kanzan."