Heike Monogatari (The Tale of the Heike) which had a phrase on its title page saying 'this is a tale of the Heike [the Taira clan] to ease people who want to learn Japanese language and Historia,' and was a book that could be used to learn Japanese language along with Isoho Monogatari (Aesop's Fables [Esopo no Fabulas]) and Kinkushu (collection of good sayings).
平家物語の題扉には「日本のことばとHistoriaを習ひ知らんと欲するひとのために世話にやはらげたる平家の物語」とあり、伊曽保物語、金句集で一つをなす日本語教育書であった。