User blog comment:Warya123456/Is Aizen really dead?/@comment-453884-20100801214948

I doubt the fact that he is dead and there is a few possible reasons he is still alive.

One: The Hogyoku could have saved him some how. Two: We don't know exactly what the Hogyoku changed him into and the abilities it gave him. Three: Yes, Gin did say that touching the blade was Kyoka Suigetsu's only weakness but what about his Bankai.