Ninjōbon
The is a pre-modern Japanese literary genre. Founded and developed in the early nineteenth century, this style of books derived from the early sharebon and kokkeibon genres and is a subgenre of gesaku. This style of novels focused on young love and were generally aimed to attract female readers. Developments. The ninjōbon genre begins around 1819 with by Ryūtei Rijō and by Jippensha Ikku as early examples of the genre. The genre reached its peak in the 1830s. Much of this was due to works of Tamenaga Shunsui beginning with in 1832. This was followed by a number  of books in the "Umegoyomi" series. However, the popularity of the genre came to abrupt end in 1842 with the introduction of the Tenpō reforms. Led by Mizuno Tadakuni, Tamenaga was manacled for 50 days, ninjōbon were confiscated and burned, and fewer books in the genre were published. The restrictions are lessened after Mizuno retires. Ninjōbon continued to be published until the early Meiji period.