According to Natalie, Oba Kai's four-panel manga "Tono to Issho" was announced to get an anime adaptation. More details will be given in Monthly Comic Flapper January issue.
Cover of Tono to Issho volume 1
Tono to Issho is a comedy manga parodying famous samurai generals and historical events.
Updated on May 6th
According to the official blog, a TV anime of Tono to Issho was announced to be aired from this July.
Source: Tono to Issho official blog