Dengeki PlayStation reports Idea Factory has another Hakuoki game in development for PSP. This week’s issue has news about Hakuoki: Bakumatsu Musou Roku, which would be something like Hakuoki: Unmatched in the End of Edo Record.
Bakumatsu would be the time period, the end the Tokugawa shogunate. It’s unclear if the "Musou" in the title stands for Koei’s Shin Sangoku Musou series better known as Dynasty Warriors in the West. We’re searching for more details.
If you aren’t familiar with the Hakuoki series of visual novels catch up by reading this interview with Aksys.