User blog comment:B214/Talk About What You Want! 2/@comment-71.108.76.65-20140511073124/@comment-1359322-20140511073457

Issei already completed his training needed to become Rias' husband, he was tested on that during Volume 8. As to Issei's personal territory, i don't think we'll see that cause Issei getting his own territory probably won't happen so soon.