Hasegawa Takejirō was an innovative Japanese publisher specializing in books in European languages on Japanese subjects. Hasegawa employed leading foreign residents as translators and noted Japanese artists as illustrators, and became a leading purveyor of export books and publications for foreign residents in Japan.

Momotarō is a popular hero of Japanese folklore. His name is often translated as Peach Boy, but is directly translated as Peach + Tarō, a common Japanese given name. Momotarō is also the title of various books, films and other works that portray the tale of this hero.