Sanpou Shoujo

An adaptation of a children's novel of the same name published in 1973. Endo Hiroko is the author, who was inspired to write the story from a tale her father told her as a child. It follows a 13 year old girl named Aki. During a pilgrimage to Sensou-ji (a Buddhist temple located in Asakusa, Tokyo), she found a mistake in the sangaku. News spread quickly of her intellect and eventually landed upon Arima Yoriyuki, the lord of the Kurume Domain (he himself was famous for finding the rational appro...